chrome/browser/devtools/device/adb/mock_adb_server.cc - chromium/src - Git at Google

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "chrome/browser/devtools/device/adb/mock_adb_server.h"

 #include <stddef.h>
 #include <stdint.h>

 #include "base/bind.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/sequence_checker.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/task/post_task.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/public/browser/browser_task_traits.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/browser_test.h"
 #include "content/public/test/test_utils.h"
 #include "net/base/io_buffer.h"
 #include "net/base/ip_address.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
 #include "net/log/net_log_source.h"
 #include "net/socket/stream_socket.h"
 #include "net/socket/tcp_server_socket.h"
 #include "net/traffic_annotation/network_traffic_annotation_test_helper.h"

 using content::BrowserThread;

 namespace {

 const char kHostTransportPrefix[] = "host:transport:";
 const char kLocalAbstractPrefix[] = "localabstract:";

 const char kShellPrefix[] = "shell:";
 const char kOpenedUnixSocketsCommand[] = "cat /proc/net/unix";
 const char kDeviceModelCommand[] = "getprop ro.product.model";
 const char kDumpsysCommand[] = "dumpsys window policy";
 const char kListProcessesCommand[] = "ps";
 const char kListUsersCommand[] = "dumpsys user";
 const char kEchoCommandPrefix[] = "echo ";

 const char kSerialOnline[] = "01498B321301A00A";
 const char kSerialOffline[] = "01498B2B0D01300E";
 const char kDeviceModel[] = "Nexus 6";

 const char kJsonVersionPath[] = "/json/version";
 const char kJsonPath[] = "/json";
 const char kJsonListPath[] = "/json/list";

 const char kHttpRequestTerminator[] = "\r\n\r\n";

 const char kHttpResponse[] =
     "HTTP/1.1 200 OK\r\n"
     "Content-Length:%d\r\n"
     "Content-Type:application/json; charset=UTF-8\r\n\r\n%s";

 const char kSampleOpenedUnixSockets[] =
     "Num       RefCount Protocol Flags    Type St Inode Path\n"
     "00000000: 00000004 00000000"
     " 00000000 0002 01  3328 /dev/socket/wpa_wlan0\n"
     "00000000: 00000002 00000000"
     " 00010000 0001 01  5394 /dev/socket/vold\n"
     "00000000: 00000002 00000000"
     " 00010000 0001 01 11810 @webview_devtools_remote_2425\n"
     "00000000: 00000002 00000000"
     " 00010000 0001 01 20893 @chrome_devtools_remote\n"
     "00000000: 00000002 00000000"
     " 00010000 0001 01 20894 @chrome_devtools_remote_1002\n"
     "00000000: 00000002 00000000"
     " 00010000 0001 01 20895 @noprocess_devtools_remote\n";

 const char kSampleListProcesses[] =
     "USER    PID  PPID VSIZE  RSS    WCHAN    PC         NAME\n"
     "root    1    0    688    508    ffffffff 00000000 S /init\r\n"
     "u0_a75  2425 123  933736 193024 ffffffff 00000000 S com.sample.feed\r\n"
     "nfc     741  123  706448 26316  ffffffff 00000000 S com.android.nfc\r\n"
     "u0_a76  1001 124  111111 222222 ffffffff 00000000 S com.android.chrome\r\n"
     "u10_a77 1002 125  111111 222222 ffffffff 00000000 S com.chrome.beta\r\n"
     "u0_a78  1003 126  111111 222222 ffffffff 00000000 S com.noprocess.app\r\n";

 const char kSampleDumpsys[] =
     "WINDOW MANAGER POLICY STATE (dumpsys window policy)\r\n"
     "    mSafeMode=false mSystemReady=true mSystemBooted=true\r\n"
     "    mStable=(0,50)-(720,1184)\r\n" // Only mStable parameter is parsed
     "    mForceStatusBar=false mForceStatusBarFromKeyguard=false\r\n";

 const char kSampleListUsers[] =
     "Users:\r\n"
     "  UserInfo{0:Test User:13} serialNo=0\r\n"
     "    Created: <unknown>\r\n"
     "    Last logged in: +17m18s871ms ago\r\n"
     "  UserInfo{10:Test User : 2:10} serialNo=10\r\n"
     "    Created: +3d4h35m1s139ms ago\r\n"
     "    Last logged in: +17m26s287ms ago\r\n";

 char kSampleChromeVersion[] = "{\n"
     "   \"Browser\": \"Chrome/32.0.1679.0\",\n"
     "   \"Protocol-Version\": \"1.0\",\n"
     "   \"User-Agent\": \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 "
     "(KHTML, like Gecko) Chrome/32.0.1679.0 Safari/537.36\",\n"
     "   \"WebKit-Version\": \"537.36 (@160162)\"\n"
     "}";

 char kSampleChromeBetaVersion[] = "{\n"
     "   \"Browser\": \"Chrome/31.0.1599.0\",\n"
     "   \"Protocol-Version\": \"1.0\",\n"
     "   \"User-Agent\": \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 "
     "(KHTML, like Gecko) Chrome/32.0.1679.0 Safari/537.36\",\n"
     "   \"WebKit-Version\": \"537.36 (@160162)\"\n"
     "}";

 char kSampleWebViewVersion[] = "{\n"
     "   \"Browser\": \"Version/4.0\",\n"
     "   \"Protocol-Version\": \"1.0\",\n"
     "   \"User-Agent\": \"Mozilla/5.0 (Linux; Android 4.3; Build/KRS74B) "
     "AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Safari/537.36\",\n"
     "   \"WebKit-Version\": \"537.36 (@157588)\"\n"
     "}";

 char kSampleChromePages[] = "[ {\n"
     "   \"description\": \"\",\n"
     "   \"devtoolsFrontendUrl\": \"/devtools/devtools.html?"
     "ws=/devtools/page/0\",\n"
     "   \"id\": \"0\",\n"
     "   \"title\": \"The Chromium Projects\",\n"
     "   \"type\": \"page\",\n"
     "   \"url\": \"http://www.chromium.org/\",\n"
     "   \"webSocketDebuggerUrl\": \""
     "ws:///devtools/page/0\"\n"
     "} ]";

 char kSampleChromeBetaPages[] = "[ {\n"
     "   \"description\": \"\",\n"
     "   \"devtoolsFrontendUrl\": \"/devtools/devtools.html?"
     "ws=/devtools/page/0\",\n"
     "   \"id\": \"0\",\n"
     "   \"title\": \"The Chromium Projects\",\n"
     "   \"type\": \"page\",\n"
     "   \"url\": \"http://www.chromium.org/\",\n"
     "   \"webSocketDebuggerUrl\": \""
     "ws:///devtools/page/0\"\n"
     "} ]";

 char kSampleWebViewPages[] = "[ {\n"
     "   \"description\": \"{\\\"attached\\\":false,\\\"empty\\\":false,"
     "\\\"height\\\":1173,\\\"screenX\\\":0,\\\"screenY\\\":0,"
     "\\\"visible\\\":true,\\\"width\\\":800}\",\n"
     "   \"devtoolsFrontendUrl\": \"http://chrome-devtools-frontend.appspot.com/"
     "serve_rev/@157588/devtools.html?ws="
     "/devtools/page/3E962D4D-B676-182D-3BE8-FAE7CE224DE7\",\n"
     "   \"faviconUrl\": \"http://chromium.org/favicon.ico\",\n"
     "   \"id\": \"3E962D4D-B676-182D-3BE8-FAE7CE224DE7\",\n"
     "   \"title\": \"Blink - The Chromium Projects\",\n"
     "   \"type\": \"page\",\n"
     "   \"url\": \"http://www.chromium.org/blink\",\n"
     "   \"webSocketDebuggerUrl\": \"ws:///devtools/"
     "page/3E962D4D-B676-182D-3BE8-FAE7CE224DE7\"\n"
     "}, {\n"
     "   \"description\": \"{\\\"attached\\\":true,\\\"empty\\\":true,"
     "\\\"screenX\\\":0,\\\"screenY\\\":33,\\\"visible\\\":false}\",\n"
     "   \"devtoolsFrontendUrl\": \"http://chrome-devtools-frontend.appspot.com/"
     "serve_rev/@157588/devtools.html?ws="
     "/devtools/page/44681551-ADFD-2411-076B-3AB14C1C60E2\",\n"
     "   \"faviconUrl\": \"\",\n"
     "   \"id\": \"44681551-ADFD-2411-076B-3AB14C1C60E2\",\n"
     "   \"title\": \"More Activity\",\n"
     "   \"type\": \"page\",\n"
     "   \"url\": \"about:blank\",\n"
     "   \"webSocketDebuggerUrl\": \"ws:///devtools/page/"
     "44681551-ADFD-2411-076B-3AB14C1C60E2\"\n"
     "}]";

 static const int kBufferSize = 16*1024;
 static const uint16_t kAdbPort = 5037;

 static const int kAdbMessageHeaderSize = 4;

 class SimpleHttpServer {
  public:
   class Parser {
    public:
     virtual int Consume(const char* data, int size) = 0;
     virtual ~Parser() {}
   };

   using SendCallback = base::Callback<void(const std::string&)>;
   using ParserFactory = base::Callback<Parser*(const SendCallback&)>;

   SimpleHttpServer(const ParserFactory& factory, net::IPEndPoint endpoint);
   virtual ~SimpleHttpServer();

  private:
   class Connection {
    public:
     Connection(net::StreamSocket* socket, const ParserFactory& factory);
     virtual ~Connection();

    private:
     void Send(const std::string& message);
     void ReadData();
     void OnDataRead(int count);
     void WriteData();
     void OnDataWritten(int count);

     std::unique_ptr<net::StreamSocket> socket_;
     std::unique_ptr<Parser> parser_;
     scoped_refptr<net::GrowableIOBuffer> input_buffer_;
     scoped_refptr<net::GrowableIOBuffer> output_buffer_;
     int bytes_to_write_;
     bool read_closed_;

     SEQUENCE_CHECKER(sequence_checker_);

     base::WeakPtrFactory<Connection> weak_factory_;

     DISALLOW_COPY_AND_ASSIGN(Connection);
   };

   void OnConnect();
   void OnAccepted(int result);

   ParserFactory factory_;
   std::unique_ptr<net::TCPServerSocket> socket_;
   std::unique_ptr<net::StreamSocket> client_socket_;

   SEQUENCE_CHECKER(sequence_checker_);

   base::WeakPtrFactory<SimpleHttpServer> weak_factory_;

   DISALLOW_COPY_AND_ASSIGN(SimpleHttpServer);
 };

 SimpleHttpServer::SimpleHttpServer(const ParserFactory& factory,
                                    net::IPEndPoint endpoint)
     : factory_(factory),
       socket_(new net::TCPServerSocket(nullptr, net::NetLogSource())),
       weak_factory_(this) {
   socket_->Listen(endpoint, 5);
   OnConnect();
 }

 SimpleHttpServer::~SimpleHttpServer() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 }

 SimpleHttpServer::Connection::Connection(net::StreamSocket* socket,
                                          const ParserFactory& factory)
     : socket_(socket),
       parser_(
           factory.Run(base::Bind(&Connection::Send, base::Unretained(this)))),
       input_buffer_(base::MakeRefCounted<net::GrowableIOBuffer>()),
       output_buffer_(base::MakeRefCounted<net::GrowableIOBuffer>()),
       bytes_to_write_(0),
       read_closed_(false),
       weak_factory_(this) {
   input_buffer_->SetCapacity(kBufferSize);
   ReadData();
 }

 SimpleHttpServer::Connection::~Connection() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 }

 void SimpleHttpServer::Connection::Send(const std::string& message) {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   const char* data = message.c_str();
   int size = message.size();

   if ((output_buffer_->offset() + bytes_to_write_ + size) >
       output_buffer_->capacity()) {
     // If not enough space without relocation
     if (output_buffer_->capacity() < (bytes_to_write_ + size)) {
       // If even buffer is not enough
       int new_size = std::max(output_buffer_->capacity() * 2, size * 2);
       output_buffer_->SetCapacity(new_size);
     }
     memmove(output_buffer_->StartOfBuffer(),
             output_buffer_->data(),
             bytes_to_write_);
     output_buffer_->set_offset(0);
   }

   memcpy(output_buffer_->data() + bytes_to_write_, data, size);
   bytes_to_write_ += size;

   if (bytes_to_write_ == size)
     // If write loop wasn't yet started, then start it
     WriteData();
 }

 void SimpleHttpServer::Connection::ReadData() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);

   if (input_buffer_->RemainingCapacity() == 0)
     input_buffer_->SetCapacity(input_buffer_->capacity() * 2);

   int read_result = socket_->Read(
       input_buffer_.get(),
       input_buffer_->RemainingCapacity(),
       base::Bind(&Connection::OnDataRead, base::Unretained(this)));

   if (read_result != net::ERR_IO_PENDING)
     OnDataRead(read_result);
 }

 void SimpleHttpServer::Connection::OnDataRead(int count) {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   if (count <= 0) {
     if (bytes_to_write_ == 0)
       delete this;
     else
       read_closed_ = true;
     return;
   }
   input_buffer_->set_offset(input_buffer_->offset() + count);
   int bytes_processed;

   do {
     char* data = input_buffer_->StartOfBuffer();
     int data_size = input_buffer_->offset();
     bytes_processed = parser_->Consume(data, data_size);

     if (bytes_processed) {
       memmove(data, data + bytes_processed, data_size - bytes_processed);
       input_buffer_->set_offset(data_size - bytes_processed);
     }
   } while (bytes_processed);
   // Posting to avoid deep recursion in case of synchronous IO
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::BindOnce(&Connection::ReadData, weak_factory_.GetWeakPtr()));
 }

 void SimpleHttpServer::Connection::WriteData() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   CHECK_GE(output_buffer_->capacity(),
            output_buffer_->offset() + bytes_to_write_) << "Overflow";

   int write_result = socket_->Write(
       output_buffer_.get(), bytes_to_write_,
       base::Bind(&Connection::OnDataWritten, base::Unretained(this)),
       TRAFFIC_ANNOTATION_FOR_TESTS);

   if (write_result != net::ERR_IO_PENDING)
     OnDataWritten(write_result);
 }

 void SimpleHttpServer::Connection::OnDataWritten(int count) {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   if (count < 0) {
     delete this;
     return;
   }
   CHECK_GT(count, 0);
   CHECK_GE(output_buffer_->capacity(),
            output_buffer_->offset() + bytes_to_write_) << "Overflow";

   bytes_to_write_ -= count;
   output_buffer_->set_offset(output_buffer_->offset() + count);

   if (bytes_to_write_ != 0)
     // Posting to avoid deep recursion in case of synchronous IO
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE,
         base::BindOnce(&Connection::WriteData, weak_factory_.GetWeakPtr()));
   else if (read_closed_)
     delete this;
 }

 void SimpleHttpServer::OnConnect() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);

   int accept_result = socket_->Accept(&client_socket_,
       base::Bind(&SimpleHttpServer::OnAccepted, base::Unretained(this)));

   if (accept_result != net::ERR_IO_PENDING)
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::BindOnce(&SimpleHttpServer::OnAccepted,
                                   weak_factory_.GetWeakPtr(), accept_result));
 }

 void SimpleHttpServer::OnAccepted(int result) {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   ASSERT_EQ(result, 0);  // Fails if the socket is already in use.
   new Connection(client_socket_.release(), factory_);
   OnConnect();
 }

 class AdbParser : public SimpleHttpServer::Parser,
                   public MockAndroidConnection::Delegate {
  public:
   static Parser* Create(FlushMode flush_mode,
                         const SimpleHttpServer::SendCallback& callback) {
     return new AdbParser(flush_mode, callback);
   }

   ~AdbParser() override { DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); }

  private:
   explicit AdbParser(FlushMode flush_mode,
                      const SimpleHttpServer::SendCallback& callback)
       : flush_mode_(flush_mode),
         callback_(callback) {
   }

   int Consume(const char* data, int size) override {
     DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
     if (mock_connection_) {
       mock_connection_->Receive(std::string(data, size));
       return size;
     }
     if (size >= kAdbMessageHeaderSize) {
       std::string message_header(data, kAdbMessageHeaderSize);
       int message_size;

       EXPECT_TRUE(base::HexStringToInt(message_header, &message_size));

       if (size >= message_size + kAdbMessageHeaderSize) {
         std::string message_body(data + kAdbMessageHeaderSize, message_size);
         ProcessCommand(message_body);
         return kAdbMessageHeaderSize + message_size;
       }
     }
     return 0;
   }

   void ProcessCommand(const std::string& command) {
     DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
     if (command == "host:devices") {
       SendSuccess(base::StringPrintf("%s\tdevice\n%s\toffline",
                                      kSerialOnline,
                                      kSerialOffline));
     } else if (base::StartsWith(command, kHostTransportPrefix,
                                 base::CompareCase::SENSITIVE)) {
       serial_ = command.substr(sizeof(kHostTransportPrefix) - 1);
       SendSuccess(std::string());
     } else if (serial_ != kSerialOnline) {
       Send("FAIL", "device offline (x)");
     } else {
       mock_connection_ =
           std::make_unique<MockAndroidConnection>(this, serial_, command);
     }
   }

   void SendSuccess(const std::string& response) override {
     Send("OKAY", response);
   }

   void SendRaw(const std::string& data) override {
     callback_.Run(data);
   }

   void Send(const std::string& status, const std::string& response) {
     DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
     CHECK_EQ(4U, status.size());
     std::string buffer = status;
     if (flush_mode_ == FlushWithoutSize) {
         callback_.Run(buffer);
         buffer = std::string();
     }

     int size = response.size();
     if (size > 0) {
       static const char kHexChars[] = "0123456789ABCDEF";
       for (int i = 3; i >= 0; i--)
         buffer += kHexChars[ (size >> 4*i) & 0x0f ];
       if (flush_mode_ == FlushWithSize) {
           callback_.Run(buffer);
           buffer = std::string();
       }
       buffer += response;
       callback_.Run(buffer);
     } else if (flush_mode_ != FlushWithoutSize) {
       callback_.Run(buffer);
     }
   }

   FlushMode flush_mode_;
   SimpleHttpServer::SendCallback callback_;
   std::string serial_;
   std::unique_ptr<MockAndroidConnection> mock_connection_;

   SEQUENCE_CHECKER(sequence_checker_);
 };

 static SimpleHttpServer* mock_adb_server_ = NULL;

 void StartMockAdbServerOnIOThread(FlushMode flush_mode) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   CHECK(mock_adb_server_ == NULL);
   net::IPEndPoint endpoint(net::IPAddress(127, 0, 0, 1), kAdbPort);
   mock_adb_server_ = new SimpleHttpServer(
       base::Bind(&AdbParser::Create, flush_mode), endpoint);
 }

 void StopMockAdbServerOnIOThread() {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   CHECK(mock_adb_server_ != NULL);
   delete mock_adb_server_;
   mock_adb_server_ = NULL;
 }

 } // namespace

 MockAndroidConnection::MockAndroidConnection(
     Delegate* delegate,
     const std::string& serial,
     const std::string& command)
     : delegate_(delegate),
       serial_(serial) {
   ProcessCommand(command);
 }

 MockAndroidConnection::~MockAndroidConnection() {
 }

 void MockAndroidConnection::Receive(const std::string& data) {
   request_ += data;
   size_t request_end_pos = data.find(kHttpRequestTerminator);
   if (request_end_pos == std::string::npos)
     return;

   std::string request(request_.substr(0, request_end_pos));
   std::vector<base::StringPiece> lines = base::SplitStringPieceUsingSubstr(
       request, "\r\n", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
   CHECK_GE(2U, lines.size());
   std::vector<std::string> tokens = base::SplitString(
       lines[0], " ", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
   CHECK_EQ(3U, tokens.size());
   CHECK_EQ("GET", tokens[0]);
   CHECK_EQ("HTTP/1.1", tokens[2]);
   CHECK_EQ("Host: 0.0.0.0:0", lines[1]);

   std::string path(tokens[1]);
   if (path == kJsonPath)
     path = kJsonListPath;

   if (socket_name_ == "chrome_devtools_remote") {
     if (path == kJsonVersionPath)
       SendHTTPResponse(kSampleChromeVersion);
     else if (path == kJsonListPath)
       SendHTTPResponse(kSampleChromePages);
     else
       NOTREACHED() << "Unknown command " << request;
   } else if (socket_name_ == "chrome_devtools_remote_1002") {
     if (path == kJsonVersionPath)
       SendHTTPResponse(kSampleChromeBetaVersion);
     else if (path == kJsonListPath)
       SendHTTPResponse(kSampleChromeBetaPages);
     else
       NOTREACHED() << "Unknown command " << request;
   } else if (base::StartsWith(socket_name_, "noprocess_devtools_remote",
                               base::CompareCase::SENSITIVE)) {
     if (path == kJsonVersionPath)
       SendHTTPResponse("{}");
     else if (path == kJsonListPath)
       SendHTTPResponse("[]");
     else
       NOTREACHED() << "Unknown command " << request;
   } else if (socket_name_ == "webview_devtools_remote_2425") {
     if (path == kJsonVersionPath)
       SendHTTPResponse(kSampleWebViewVersion);
     else if (path == kJsonListPath)
       SendHTTPResponse(kSampleWebViewPages);
     else
       NOTREACHED() << "Unknown command " << request;
   } else {
     NOTREACHED() << "Unknown socket " << socket_name_;
   }
 }

 void MockAndroidConnection::ProcessCommand(const std::string& command) {
   if (base::StartsWith(command, kLocalAbstractPrefix,
                        base::CompareCase::SENSITIVE)) {
     socket_name_ = command.substr(sizeof(kLocalAbstractPrefix) - 1);
     delegate_->SendSuccess(std::string());
     return;
   }

   if (base::StartsWith(command, kShellPrefix, base::CompareCase::SENSITIVE)) {
     std::string result;
     for (const auto& line :
          base::SplitString(command.substr(sizeof(kShellPrefix) - 1), "\n",
                            base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY)) {
       if (line == kDeviceModelCommand) {
         result += kDeviceModel;
         result += "\r\n";
       } else if (line == kOpenedUnixSocketsCommand) {
         result += kSampleOpenedUnixSockets;
       } else if (line == kDumpsysCommand) {
         result += kSampleDumpsys;
       } else if (line == kListProcessesCommand) {
         result += kSampleListProcesses;
       } else if (line == kListUsersCommand) {
         result += kSampleListUsers;
       } else if (base::StartsWith(line, kEchoCommandPrefix,
                                   base::CompareCase::SENSITIVE)) {
         result += line.substr(sizeof(kEchoCommandPrefix) - 1);
         result += "\r\n";
       } else {
         NOTREACHED() << "Unknown shell command - " << command;
       }
     }
     delegate_->SendSuccess(result);
   } else {
     NOTREACHED() << "Unknown command - " << command;
   }
   delegate_->Close();
 }

 void MockAndroidConnection::SendHTTPResponse(const std::string& body) {
   std::string response_data(base::StringPrintf(kHttpResponse,
                                                static_cast<int>(body.size()),
                                                body.c_str()));
   delegate_->SendRaw(response_data);
 }

 void StartMockAdbServer(FlushMode flush_mode) {
   base::RunLoop run_loop;
   base::PostTaskWithTraitsAndReply(
       FROM_HERE, {BrowserThread::IO},
       base::BindOnce(&StartMockAdbServerOnIOThread, flush_mode),
       run_loop.QuitClosure());
   run_loop.Run();
 }

 void StopMockAdbServer() {
   base::RunLoop run_loop;
   base::PostTaskWithTraitsAndReply(FROM_HERE, {BrowserThread::IO},
                                    base::BindOnce(&StopMockAdbServerOnIOThread),
                                    run_loop.QuitClosure());
   run_loop.Run();
 }
	// Copyright 2014 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "chrome/browser/devtools/device/adb/mock_adb_server.h"

	#include <stddef.h>
	#include <stdint.h>

	#include "base/bind.h"
	#include "base/location.h"
	#include "base/macros.h"
	#include "base/memory/weak_ptr.h"
	#include "base/message_loop/message_loop.h"
	#include "base/run_loop.h"
	#include "base/sequence_checker.h"
	#include "base/single_thread_task_runner.h"
	#include "base/strings/string_number_conversions.h"
	#include "base/strings/string_split.h"
	#include "base/strings/string_util.h"
	#include "base/strings/stringprintf.h"
	#include "base/task/post_task.h"
	#include "base/threading/thread_task_runner_handle.h"
	#include "content/public/browser/browser_task_traits.h"
	#include "content/public/browser/browser_thread.h"
	#include "content/public/test/browser_test.h"
	#include "content/public/test/test_utils.h"
	#include "net/base/io_buffer.h"
	#include "net/base/ip_address.h"
	#include "net/base/ip_endpoint.h"
	#include "net/base/net_errors.h"
	#include "net/log/net_log_source.h"
	#include "net/socket/stream_socket.h"
	#include "net/socket/tcp_server_socket.h"
	#include "net/traffic_annotation/network_traffic_annotation_test_helper.h"

	using content::BrowserThread;

	namespace {

	const char kHostTransportPrefix[] = "host:transport:";
	const char kLocalAbstractPrefix[] = "localabstract:";

	const char kShellPrefix[] = "shell:";
	const char kOpenedUnixSocketsCommand[] = "cat /proc/net/unix";
	const char kDeviceModelCommand[] = "getprop ro.product.model";
	const char kDumpsysCommand[] = "dumpsys window policy";
	const char kListProcessesCommand[] = "ps";
	const char kListUsersCommand[] = "dumpsys user";
	const char kEchoCommandPrefix[] = "echo ";

	const char kSerialOnline[] = "01498B321301A00A";
	const char kSerialOffline[] = "01498B2B0D01300E";
	const char kDeviceModel[] = "Nexus 6";

	const char kJsonVersionPath[] = "/json/version";
	const char kJsonPath[] = "/json";
	const char kJsonListPath[] = "/json/list";

	const char kHttpRequestTerminator[] = "\r\n\r\n";

	const char kHttpResponse[] =
	"HTTP/1.1 200 OK\r\n"
	"Content-Length:%d\r\n"
	"Content-Type:application/json; charset=UTF-8\r\n\r\n%s";

	const char kSampleOpenedUnixSockets[] =
	"Num RefCount Protocol Flags Type St Inode Path\n"
	"00000000: 00000004 00000000"
	" 00000000 0002 01 3328 /dev/socket/wpa_wlan0\n"
	"00000000: 00000002 00000000"
	" 00010000 0001 01 5394 /dev/socket/vold\n"
	"00000000: 00000002 00000000"
	" 00010000 0001 01 11810 @webview_devtools_remote_2425\n"
	"00000000: 00000002 00000000"
	" 00010000 0001 01 20893 @chrome_devtools_remote\n"
	"00000000: 00000002 00000000"
	" 00010000 0001 01 20894 @chrome_devtools_remote_1002\n"
	"00000000: 00000002 00000000"
	" 00010000 0001 01 20895 @noprocess_devtools_remote\n";

	const char kSampleListProcesses[] =
	"USER PID PPID VSIZE RSS WCHAN PC NAME\n"
	"root 1 0 688 508 ffffffff 00000000 S /init\r\n"
	"u0_a75 2425 123 933736 193024 ffffffff 00000000 S com.sample.feed\r\n"
	"nfc 741 123 706448 26316 ffffffff 00000000 S com.android.nfc\r\n"
	"u0_a76 1001 124 111111 222222 ffffffff 00000000 S com.android.chrome\r\n"
	"u10_a77 1002 125 111111 222222 ffffffff 00000000 S com.chrome.beta\r\n"
	"u0_a78 1003 126 111111 222222 ffffffff 00000000 S com.noprocess.app\r\n";

	const char kSampleDumpsys[] =
	"WINDOW MANAGER POLICY STATE (dumpsys window policy)\r\n"
	" mSafeMode=false mSystemReady=true mSystemBooted=true\r\n"
	" mStable=(0,50)-(720,1184)\r\n" // Only mStable parameter is parsed
	" mForceStatusBar=false mForceStatusBarFromKeyguard=false\r\n";

	const char kSampleListUsers[] =
	"Users:\r\n"
	" UserInfo{0:Test User:13} serialNo=0\r\n"
	" Created: <unknown>\r\n"
	" Last logged in: +17m18s871ms ago\r\n"
	" UserInfo{10:Test User : 2:10} serialNo=10\r\n"
	" Created: +3d4h35m1s139ms ago\r\n"
	" Last logged in: +17m26s287ms ago\r\n";

	char kSampleChromeVersion[] = "{\n"
	" \"Browser\": \"Chrome/32.0.1679.0\",\n"
	" \"Protocol-Version\": \"1.0\",\n"
	" \"User-Agent\": \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 "
	"(KHTML, like Gecko) Chrome/32.0.1679.0 Safari/537.36\",\n"
	" \"WebKit-Version\": \"537.36 (@160162)\"\n"
	"}";

	char kSampleChromeBetaVersion[] = "{\n"
	" \"Browser\": \"Chrome/31.0.1599.0\",\n"
	" \"Protocol-Version\": \"1.0\",\n"
	" \"User-Agent\": \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 "
	"(KHTML, like Gecko) Chrome/32.0.1679.0 Safari/537.36\",\n"
	" \"WebKit-Version\": \"537.36 (@160162)\"\n"
	"}";

	char kSampleWebViewVersion[] = "{\n"
	" \"Browser\": \"Version/4.0\",\n"
	" \"Protocol-Version\": \"1.0\",\n"
	" \"User-Agent\": \"Mozilla/5.0 (Linux; Android 4.3; Build/KRS74B) "
	"AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Safari/537.36\",\n"
	" \"WebKit-Version\": \"537.36 (@157588)\"\n"
	"}";

	char kSampleChromePages[] = "[ {\n"
	" \"description\": \"\",\n"
	" \"devtoolsFrontendUrl\": \"/devtools/devtools.html?"
	"ws=/devtools/page/0\",\n"
	" \"id\": \"0\",\n"
	" \"title\": \"The Chromium Projects\",\n"
	" \"type\": \"page\",\n"
	" \"url\": \"http://www.chromium.org/\",\n"
	" \"webSocketDebuggerUrl\": \""
	"ws:///devtools/page/0\"\n"
	"} ]";

	char kSampleChromeBetaPages[] = "[ {\n"
	" \"description\": \"\",\n"
	" \"devtoolsFrontendUrl\": \"/devtools/devtools.html?"
	"ws=/devtools/page/0\",\n"
	" \"id\": \"0\",\n"
	" \"title\": \"The Chromium Projects\",\n"
	" \"type\": \"page\",\n"
	" \"url\": \"http://www.chromium.org/\",\n"
	" \"webSocketDebuggerUrl\": \""
	"ws:///devtools/page/0\"\n"
	"} ]";

	char kSampleWebViewPages[] = "[ {\n"
	" \"description\": \"{\\\"attached\\\":false,\\\"empty\\\":false,"
	"\\\"height\\\":1173,\\\"screenX\\\":0,\\\"screenY\\\":0,"
	"\\\"visible\\\":true,\\\"width\\\":800}\",\n"
	" \"devtoolsFrontendUrl\": \"http://chrome-devtools-frontend.appspot.com/"
	"serve_rev/@157588/devtools.html?ws="
	"/devtools/page/3E962D4D-B676-182D-3BE8-FAE7CE224DE7\",\n"
	" \"faviconUrl\": \"http://chromium.org/favicon.ico\",\n"
	" \"id\": \"3E962D4D-B676-182D-3BE8-FAE7CE224DE7\",\n"
	" \"title\": \"Blink - The Chromium Projects\",\n"
	" \"type\": \"page\",\n"
	" \"url\": \"http://www.chromium.org/blink\",\n"
	" \"webSocketDebuggerUrl\": \"ws:///devtools/"
	"page/3E962D4D-B676-182D-3BE8-FAE7CE224DE7\"\n"
	"}, {\n"
	" \"description\": \"{\\\"attached\\\":true,\\\"empty\\\":true,"
	"\\\"screenX\\\":0,\\\"screenY\\\":33,\\\"visible\\\":false}\",\n"
	" \"devtoolsFrontendUrl\": \"http://chrome-devtools-frontend.appspot.com/"
	"serve_rev/@157588/devtools.html?ws="
	"/devtools/page/44681551-ADFD-2411-076B-3AB14C1C60E2\",\n"
	" \"faviconUrl\": \"\",\n"
	" \"id\": \"44681551-ADFD-2411-076B-3AB14C1C60E2\",\n"
	" \"title\": \"More Activity\",\n"
	" \"type\": \"page\",\n"
	" \"url\": \"about:blank\",\n"
	" \"webSocketDebuggerUrl\": \"ws:///devtools/page/"
	"44681551-ADFD-2411-076B-3AB14C1C60E2\"\n"
	"}]";

	static const int kBufferSize = 16*1024;
	static const uint16_t kAdbPort = 5037;

	static const int kAdbMessageHeaderSize = 4;

	class SimpleHttpServer {
	public:
	class Parser {
	public:
	virtual int Consume(const char* data, int size) = 0;
	virtual ~Parser() {}
	};

	using SendCallback = base::Callback<void(const std::string&)>;
	using ParserFactory = base::Callback<Parser*(const SendCallback&)>;

	SimpleHttpServer(const ParserFactory& factory, net::IPEndPoint endpoint);
	virtual ~SimpleHttpServer();

	private:
	class Connection {
	public:
	Connection(net::StreamSocket* socket, const ParserFactory& factory);
	virtual ~Connection();

	private:
	void Send(const std::string& message);
	void ReadData();
	void OnDataRead(int count);
	void WriteData();
	void OnDataWritten(int count);

	std::unique_ptr<net::StreamSocket> socket_;
	std::unique_ptr<Parser> parser_;
	scoped_refptr<net::GrowableIOBuffer> input_buffer_;
	scoped_refptr<net::GrowableIOBuffer> output_buffer_;
	int bytes_to_write_;
	bool read_closed_;

	SEQUENCE_CHECKER(sequence_checker_);

	base::WeakPtrFactory<Connection> weak_factory_;

	DISALLOW_COPY_AND_ASSIGN(Connection);
	};

	void OnConnect();
	void OnAccepted(int result);

	ParserFactory factory_;
	std::unique_ptr<net::TCPServerSocket> socket_;
	std::unique_ptr<net::StreamSocket> client_socket_;

	SEQUENCE_CHECKER(sequence_checker_);

	base::WeakPtrFactory<SimpleHttpServer> weak_factory_;

	DISALLOW_COPY_AND_ASSIGN(SimpleHttpServer);
	};

	SimpleHttpServer::SimpleHttpServer(const ParserFactory& factory,
	net::IPEndPoint endpoint)
	: factory_(factory),
	socket_(new net::TCPServerSocket(nullptr, net::NetLogSource())),
	weak_factory_(this) {
	socket_->Listen(endpoint, 5);
	OnConnect();
	}

	SimpleHttpServer::~SimpleHttpServer() {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
	}

	SimpleHttpServer::Connection::Connection(net::StreamSocket* socket,
	const ParserFactory& factory)
	: socket_(socket),
	parser_(
	factory.Run(base::Bind(&Connection::Send, base::Unretained(this)))),
	input_buffer_(base::MakeRefCounted<net::GrowableIOBuffer>()),
	output_buffer_(base::MakeRefCounted<net::GrowableIOBuffer>()),
	bytes_to_write_(0),
	read_closed_(false),
	weak_factory_(this) {
	input_buffer_->SetCapacity(kBufferSize);
	ReadData();
	}

	SimpleHttpServer::Connection::~Connection() {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
	}

	void SimpleHttpServer::Connection::Send(const std::string& message) {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
	const char* data = message.c_str();
	int size = message.size();

	if ((output_buffer_->offset() + bytes_to_write_ + size) >
	output_buffer_->capacity()) {
	// If not enough space without relocation
	if (output_buffer_->capacity() < (bytes_to_write_ + size)) {
	// If even buffer is not enough
	int new_size = std::max(output_buffer_->capacity() * 2, size * 2);
	output_buffer_->SetCapacity(new_size);
	}
	memmove(output_buffer_->StartOfBuffer(),
	output_buffer_->data(),
	bytes_to_write_);
	output_buffer_->set_offset(0);
	}

	memcpy(output_buffer_->data() + bytes_to_write_, data, size);
	bytes_to_write_ += size;

	if (bytes_to_write_ == size)
	// If write loop wasn't yet started, then start it
	WriteData();
	}

	void SimpleHttpServer::Connection::ReadData() {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);

	if (input_buffer_->RemainingCapacity() == 0)
	input_buffer_->SetCapacity(input_buffer_->capacity() * 2);

	int read_result = socket_->Read(
	input_buffer_.get(),
	input_buffer_->RemainingCapacity(),
	base::Bind(&Connection::OnDataRead, base::Unretained(this)));

	if (read_result != net::ERR_IO_PENDING)
	OnDataRead(read_result);
	}

	void SimpleHttpServer::Connection::OnDataRead(int count) {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
	if (count <= 0) {
	if (bytes_to_write_ == 0)
	delete this;
	else
	read_closed_ = true;
	return;
	}
	input_buffer_->set_offset(input_buffer_->offset() + count);
	int bytes_processed;

	do {
	char* data = input_buffer_->StartOfBuffer();
	int data_size = input_buffer_->offset();
	bytes_processed = parser_->Consume(data, data_size);

	if (bytes_processed) {
	memmove(data, data + bytes_processed, data_size - bytes_processed);
	input_buffer_->set_offset(data_size - bytes_processed);
	}
	} while (bytes_processed);
	// Posting to avoid deep recursion in case of synchronous IO
	base::ThreadTaskRunnerHandle::Get()->PostTask(
	FROM_HERE,
	base::BindOnce(&Connection::ReadData, weak_factory_.GetWeakPtr()));
	}

	void SimpleHttpServer::Connection::WriteData() {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
	CHECK_GE(output_buffer_->capacity(),
	output_buffer_->offset() + bytes_to_write_) << "Overflow";

	int write_result = socket_->Write(
	output_buffer_.get(), bytes_to_write_,
	base::Bind(&Connection::OnDataWritten, base::Unretained(this)),
	TRAFFIC_ANNOTATION_FOR_TESTS);

	if (write_result != net::ERR_IO_PENDING)
	OnDataWritten(write_result);
	}

	void SimpleHttpServer::Connection::OnDataWritten(int count) {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
	if (count < 0) {
	delete this;
	return;
	}
	CHECK_GT(count, 0);
	CHECK_GE(output_buffer_->capacity(),
	output_buffer_->offset() + bytes_to_write_) << "Overflow";

	bytes_to_write_ -= count;
	output_buffer_->set_offset(output_buffer_->offset() + count);

	if (bytes_to_write_ != 0)
	// Posting to avoid deep recursion in case of synchronous IO
	base::ThreadTaskRunnerHandle::Get()->PostTask(
	FROM_HERE,
	base::BindOnce(&Connection::WriteData, weak_factory_.GetWeakPtr()));
	else if (read_closed_)
	delete this;
	}

	void SimpleHttpServer::OnConnect() {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);

	int accept_result = socket_->Accept(&client_socket_,
	base::Bind(&SimpleHttpServer::OnAccepted, base::Unretained(this)));

	if (accept_result != net::ERR_IO_PENDING)
	base::ThreadTaskRunnerHandle::Get()->PostTask(
	FROM_HERE, base::BindOnce(&SimpleHttpServer::OnAccepted,
	weak_factory_.GetWeakPtr(), accept_result));
	}

	void SimpleHttpServer::OnAccepted(int result) {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
	ASSERT_EQ(result, 0); // Fails if the socket is already in use.
	new Connection(client_socket_.release(), factory_);
	OnConnect();
	}

	class AdbParser : public SimpleHttpServer::Parser,
	public MockAndroidConnection::Delegate {
	public:
	static Parser* Create(FlushMode flush_mode,
	const SimpleHttpServer::SendCallback& callback) {
	return new AdbParser(flush_mode, callback);
	}

	~AdbParser() override { DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); }

	private:
	explicit AdbParser(FlushMode flush_mode,
	const SimpleHttpServer::SendCallback& callback)
	: flush_mode_(flush_mode),
	callback_(callback) {
	}

	int Consume(const char* data, int size) override {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
	if (mock_connection_) {
	mock_connection_->Receive(std::string(data, size));
	return size;
	}
	if (size >= kAdbMessageHeaderSize) {
	std::string message_header(data, kAdbMessageHeaderSize);
	int message_size;

	EXPECT_TRUE(base::HexStringToInt(message_header, &message_size));

	if (size >= message_size + kAdbMessageHeaderSize) {
	std::string message_body(data + kAdbMessageHeaderSize, message_size);
	ProcessCommand(message_body);
	return kAdbMessageHeaderSize + message_size;
	}
	}
	return 0;
	}

	void ProcessCommand(const std::string& command) {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
	if (command == "host:devices") {
	SendSuccess(base::StringPrintf("%s\tdevice\n%s\toffline",
	kSerialOnline,
	kSerialOffline));
	} else if (base::StartsWith(command, kHostTransportPrefix,
	base::CompareCase::SENSITIVE)) {
	serial_ = command.substr(sizeof(kHostTransportPrefix) - 1);
	SendSuccess(std::string());
	} else if (serial_ != kSerialOnline) {
	Send("FAIL", "device offline (x)");
	} else {
	mock_connection_ =
	std::make_unique<MockAndroidConnection>(this, serial_, command);
	}
	}

	void SendSuccess(const std::string& response) override {
	Send("OKAY", response);
	}

	void SendRaw(const std::string& data) override {
	callback_.Run(data);
	}

	void Send(const std::string& status, const std::string& response) {
	DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
	CHECK_EQ(4U, status.size());
	std::string buffer = status;
	if (flush_mode_ == FlushWithoutSize) {
	callback_.Run(buffer);
	buffer = std::string();
	}

	int size = response.size();
	if (size > 0) {
	static const char kHexChars[] = "0123456789ABCDEF";
	for (int i = 3; i >= 0; i--)
	buffer += kHexChars[ (size >> 4*i) & 0x0f ];
	if (flush_mode_ == FlushWithSize) {
	callback_.Run(buffer);
	buffer = std::string();
	}
	buffer += response;
	callback_.Run(buffer);
	} else if (flush_mode_ != FlushWithoutSize) {
	callback_.Run(buffer);
	}
	}

	FlushMode flush_mode_;
	SimpleHttpServer::SendCallback callback_;
	std::string serial_;
	std::unique_ptr<MockAndroidConnection> mock_connection_;

	SEQUENCE_CHECKER(sequence_checker_);
	};

	static SimpleHttpServer* mock_adb_server_ = NULL;

	void StartMockAdbServerOnIOThread(FlushMode flush_mode) {
	CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
	CHECK(mock_adb_server_ == NULL);
	net::IPEndPoint endpoint(net::IPAddress(127, 0, 0, 1), kAdbPort);
	mock_adb_server_ = new SimpleHttpServer(
	base::Bind(&AdbParser::Create, flush_mode), endpoint);
	}

	void StopMockAdbServerOnIOThread() {
	CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
	CHECK(mock_adb_server_ != NULL);
	delete mock_adb_server_;
	mock_adb_server_ = NULL;
	}

	} // namespace

	MockAndroidConnection::MockAndroidConnection(
	Delegate* delegate,
	const std::string& serial,
	const std::string& command)
	: delegate_(delegate),
	serial_(serial) {
	ProcessCommand(command);
	}

	MockAndroidConnection::~MockAndroidConnection() {
	}

	void MockAndroidConnection::Receive(const std::string& data) {
	request_ += data;
	size_t request_end_pos = data.find(kHttpRequestTerminator);
	if (request_end_pos == std::string::npos)
	return;

	std::string request(request_.substr(0, request_end_pos));
	std::vector<base::StringPiece> lines = base::SplitStringPieceUsingSubstr(
	request, "\r\n", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
	CHECK_GE(2U, lines.size());
	std::vector<std::string> tokens = base::SplitString(
	lines[0], " ", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
	CHECK_EQ(3U, tokens.size());
	CHECK_EQ("GET", tokens[0]);
	CHECK_EQ("HTTP/1.1", tokens[2]);
	CHECK_EQ("Host: 0.0.0.0:0", lines[1]);

	std::string path(tokens[1]);
	if (path == kJsonPath)
	path = kJsonListPath;

	if (socket_name_ == "chrome_devtools_remote") {
	if (path == kJsonVersionPath)
	SendHTTPResponse(kSampleChromeVersion);
	else if (path == kJsonListPath)
	SendHTTPResponse(kSampleChromePages);
	else
	NOTREACHED() << "Unknown command " << request;
	} else if (socket_name_ == "chrome_devtools_remote_1002") {
	if (path == kJsonVersionPath)
	SendHTTPResponse(kSampleChromeBetaVersion);
	else if (path == kJsonListPath)
	SendHTTPResponse(kSampleChromeBetaPages);
	else
	NOTREACHED() << "Unknown command " << request;
	} else if (base::StartsWith(socket_name_, "noprocess_devtools_remote",
	base::CompareCase::SENSITIVE)) {
	if (path == kJsonVersionPath)
	SendHTTPResponse("{}");
	else if (path == kJsonListPath)
	SendHTTPResponse("[]");
	else
	NOTREACHED() << "Unknown command " << request;
	} else if (socket_name_ == "webview_devtools_remote_2425") {
	if (path == kJsonVersionPath)
	SendHTTPResponse(kSampleWebViewVersion);
	else if (path == kJsonListPath)
	SendHTTPResponse(kSampleWebViewPages);
	else
	NOTREACHED() << "Unknown command " << request;
	} else {
	NOTREACHED() << "Unknown socket " << socket_name_;
	}
	}

	void MockAndroidConnection::ProcessCommand(const std::string& command) {
	if (base::StartsWith(command, kLocalAbstractPrefix,
	base::CompareCase::SENSITIVE)) {
	socket_name_ = command.substr(sizeof(kLocalAbstractPrefix) - 1);
	delegate_->SendSuccess(std::string());
	return;
	}

	if (base::StartsWith(command, kShellPrefix, base::CompareCase::SENSITIVE)) {
	std::string result;
	for (const auto& line :
	base::SplitString(command.substr(sizeof(kShellPrefix) - 1), "\n",
	base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY)) {
	if (line == kDeviceModelCommand) {
	result += kDeviceModel;
	result += "\r\n";
	} else if (line == kOpenedUnixSocketsCommand) {
	result += kSampleOpenedUnixSockets;
	} else if (line == kDumpsysCommand) {
	result += kSampleDumpsys;
	} else if (line == kListProcessesCommand) {
	result += kSampleListProcesses;
	} else if (line == kListUsersCommand) {
	result += kSampleListUsers;
	} else if (base::StartsWith(line, kEchoCommandPrefix,
	base::CompareCase::SENSITIVE)) {
	result += line.substr(sizeof(kEchoCommandPrefix) - 1);
	result += "\r\n";
	} else {
	NOTREACHED() << "Unknown shell command - " << command;
	}
	}
	delegate_->SendSuccess(result);
	} else {
	NOTREACHED() << "Unknown command - " << command;
	}
	delegate_->Close();
	}

	void MockAndroidConnection::SendHTTPResponse(const std::string& body) {
	std::string response_data(base::StringPrintf(kHttpResponse,
	static_cast<int>(body.size()),
	body.c_str()));
	delegate_->SendRaw(response_data);
	}

	void StartMockAdbServer(FlushMode flush_mode) {
	base::RunLoop run_loop;
	base::PostTaskWithTraitsAndReply(
	FROM_HERE, {BrowserThread::IO},
	base::BindOnce(&StartMockAdbServerOnIOThread, flush_mode),
	run_loop.QuitClosure());
	run_loop.Run();
	}

	void StopMockAdbServer() {
	base::RunLoop run_loop;
	base::PostTaskWithTraitsAndReply(FROM_HERE, {BrowserThread::IO},
	base::BindOnce(&StopMockAdbServerOnIOThread),
	run_loop.QuitClosure());
	run_loop.Run();
	}