content/renderer/renderer_blink_platform_impl.cc

// Copyright (c) 2012 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 "content/renderer/renderer_blink_platform_impl.h"

#include <algorithm>
#include <memory>
#include <utility>
#include <vector>

#include "base/bind.h"
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/files/file_path.h"
#include "base/guid.h"
#include "base/lazy_instance.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/metrics/histogram_macros.h"
#include "base/numerics/safe_conversions.h"
#include "base/single_thread_task_runner.h"
#include "base/strings/pattern.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/sys_string_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/post_task.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "components/url_formatter/url_formatter.h"
#include "content/child/child_process.h"
#include "content/child/thread_safe_sender.h"
#include "content/common/frame_messages.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/gpu_stream_constants.h"
#include "content/public/common/service_manager_connection.h"
#include "content/public/common/service_names.mojom.h"
#include "content/public/common/webplugininfo.h"
#include "content/public/renderer/content_renderer_client.h"
#include "content/public/renderer/render_frame.h"
#include "content/renderer/loader/child_url_loader_factory_bundle.h"
#include "content/renderer/loader/code_cache_loader_impl.h"
#include "content/renderer/loader/resource_dispatcher.h"
#include "content/renderer/loader/web_url_loader_impl.h"
#include "content/renderer/media/audio/audio_device_factory.h"
#include "content/renderer/media/audio_decoder.h"
#include "content/renderer/media/renderer_webaudiodevice_impl.h"
#include "content/renderer/render_frame_impl.h"
#include "content/renderer/render_thread_impl.h"
#include "content/renderer/storage_util.h"
#include "content/renderer/webgraphicscontext3d_provider_impl.h"
#include "content/renderer/worker/dedicated_worker_host_factory_client.h"
#include "content/renderer/worker/worker_thread_registry.h"
#include "device/gamepad/public/cpp/gamepads.h"
#include "gpu/command_buffer/client/gles2_interface.h"
#include "gpu/config/gpu_info.h"
#include "gpu/ipc/client/gpu_channel_host.h"
#include "media/audio/audio_output_device.h"
#include "media/base/media_permission.h"
#include "media/base/media_switches.h"
#include "media/blink/webcontentdecryptionmodule_impl.h"
#include "media/filters/stream_parser_factory.h"
#include "media/video/gpu_video_accelerator_factories.h"
#include "media/webrtc/webrtc_switches.h"
#include "mojo/public/cpp/base/big_buffer.h"
#include "mojo/public/cpp/system/platform_handle.h"
#include "ppapi/buildflags/buildflags.h"
#include "services/network/public/cpp/features.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "services/network/public/cpp/wrapper_shared_url_loader_factory.h"
#include "services/service_manager/public/cpp/interface_provider.h"
#include "services/viz/public/cpp/gpu/context_provider_command_buffer.h"
#include "storage/common/database/database_identifier.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/public/common/origin_trials/trial_token_validator.h"
#include "third_party/blink/public/common/thread_safe_browser_interface_broker_proxy.h"
#include "third_party/blink/public/mojom/indexeddb/indexeddb.mojom.h"
#include "third_party/blink/public/platform/blame_context.h"
#include "third_party/blink/public/platform/file_path_conversion.h"
#include "third_party/blink/public/platform/interface_provider.h"
#include "third_party/blink/public/platform/modules/video_capture/web_video_capture_impl_manager.h"
#include "third_party/blink/public/platform/scheduler/web_thread_scheduler.h"
#include "third_party/blink/public/platform/url_conversion.h"
#include "third_party/blink/public/platform/web_audio_latency_hint.h"
#include "third_party/blink/public/platform/web_security_origin.h"
#include "third_party/blink/public/platform/web_theme_engine.h"
#include "third_party/blink/public/platform/web_url.h"
#include "third_party/blink/public/platform/web_url_loader_factory.h"
#include "third_party/blink/public/platform/web_url_request.h"
#include "third_party/blink/public/platform/web_vector.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "third_party/blink/public/web/web_user_media_request.h"
#include "third_party/sqlite/sqlite3.h"
#include "ui/base/ui_base_switches.h"
#include "ui/gl/buildflags.h"
#include "url/gurl.h"

#if defined(OS_MACOSX)
#include "content/child/child_process_sandbox_support_impl_mac.h"
#elif defined(OS_LINUX)
#include "content/child/child_process_sandbox_support_impl_linux.h"
#endif

#if defined(OS_POSIX)
#include "base/file_descriptor_posix.h"
#endif

#if defined(OS_WIN)
#include "base/win/windows_version.h"
#endif

using blink::Platform;
using blink::WebAudioDevice;
using blink::WebAudioLatencyHint;
using blink::WebMediaStreamTrack;
using blink::WebSize;
using blink::WebString;
using blink::WebURL;
using blink::WebVector;

namespace content {

namespace {

media::AudioParameters GetAudioHardwareParams() {
  blink::WebLocalFrame* const web_frame =
      blink::WebLocalFrame::FrameForCurrentContext();
  RenderFrame* const render_frame = RenderFrame::FromWebFrame(web_frame);
  if (!render_frame)
    return media::AudioParameters::UnavailableDeviceParams();

  return AudioDeviceFactory::GetOutputDeviceInfo(render_frame->GetRoutingID(),
                                                 media::AudioSinkParameters())
      .output_params();
}

gpu::ContextType ToGpuContextType(blink::Platform::ContextType type) {
  switch (type) {
    case blink::Platform::kWebGL1ContextType:
      return gpu::CONTEXT_TYPE_WEBGL1;
    case blink::Platform::kWebGL2ContextType:
      return gpu::CONTEXT_TYPE_WEBGL2;
    case blink::Platform::kWebGL2ComputeContextType:
      return gpu::CONTEXT_TYPE_WEBGL2_COMPUTE;
    case blink::Platform::kGLES2ContextType:
      return gpu::CONTEXT_TYPE_OPENGLES2;
    case blink::Platform::kGLES3ContextType:
      return gpu::CONTEXT_TYPE_OPENGLES3;
    case blink::Platform::kWebGPUContextType:
      return gpu::CONTEXT_TYPE_WEBGPU;
  }
  NOTREACHED();
  return gpu::CONTEXT_TYPE_OPENGLES2;
}

}  // namespace

//------------------------------------------------------------------------------

RendererBlinkPlatformImpl::RendererBlinkPlatformImpl(
    blink::scheduler::WebThreadScheduler* main_thread_scheduler)
    : BlinkPlatformImpl(main_thread_scheduler->DefaultTaskRunner(),
                        RenderThreadImpl::current()
                            ? RenderThreadImpl::current()->GetIOTaskRunner()
                            : nullptr),
      sudden_termination_disables_(0),
      is_locked_to_site_(false),
      default_task_runner_(main_thread_scheduler->DefaultTaskRunner()),
      main_thread_scheduler_(main_thread_scheduler) {

  // RenderThread may not exist in some tests.
  if (RenderThreadImpl::current()) {
    io_runner_ = RenderThreadImpl::current()->GetIOTaskRunner();
    thread_safe_sender_ = RenderThreadImpl::current()->thread_safe_sender();
#if defined(OS_LINUX)
    mojo::PendingRemote<font_service::mojom::FontService> font_service;
    RenderThreadImpl::current()->BindHostReceiver(
        font_service.InitWithNewPipeAndPassReceiver());
    font_loader_ =
        sk_make_sp<font_service::FontLoader>(std::move(font_service));
    SkFontConfigInterface::SetGlobal(font_loader_);
#endif
  }

#if defined(OS_LINUX) || defined(OS_MACOSX)
  if (sandboxEnabled()) {
#if defined(OS_MACOSX)
    sandbox_support_ = std::make_unique<WebSandboxSupportMac>();
#else
    sandbox_support_.reset(new WebSandboxSupportLinux(font_loader_));
#endif
  } else {
    DVLOG(1) << "Disabling sandbox support for testing.";
  }
#endif

  top_level_blame_context_.Initialize();
  main_thread_scheduler_->SetTopLevelBlameContext(&top_level_blame_context_);

  GetBrowserInterfaceBroker()->GetInterface(
      code_cache_host_remote_.InitWithNewPipeAndPassReceiver());
}

RendererBlinkPlatformImpl::~RendererBlinkPlatformImpl() {
  main_thread_scheduler_->SetTopLevelBlameContext(nullptr);
}

void RendererBlinkPlatformImpl::Shutdown() {}

//------------------------------------------------------------------------------

std::unique_ptr<blink::WebURLLoaderFactory>
RendererBlinkPlatformImpl::CreateDefaultURLLoaderFactory() {
  if (!RenderThreadImpl::current()) {
    // RenderThreadImpl is null in some tests, the default factory impl
    // takes care of that in the case.
    return std::make_unique<WebURLLoaderFactoryImpl>(nullptr, nullptr);
  }
  return std::make_unique<WebURLLoaderFactoryImpl>(
      RenderThreadImpl::current()->resource_dispatcher()->GetWeakPtr(),
      CreateDefaultURLLoaderFactoryBundle());
}

std::unique_ptr<blink::CodeCacheLoader>
RendererBlinkPlatformImpl::CreateCodeCacheLoader() {
  return std::make_unique<CodeCacheLoaderImpl>();
}

std::unique_ptr<blink::WebURLLoaderFactory>
RendererBlinkPlatformImpl::WrapURLLoaderFactory(
    mojo::ScopedMessagePipeHandle url_loader_factory_handle) {
  return std::make_unique<WebURLLoaderFactoryImpl>(
      RenderThreadImpl::current()->resource_dispatcher()->GetWeakPtr(),
      base::MakeRefCounted<network::WrapperSharedURLLoaderFactory>(
          mojo::PendingRemote<network::mojom::URLLoaderFactory>(
              std::move(url_loader_factory_handle),
              network::mojom::URLLoaderFactory::Version_)));
}

std::unique_ptr<blink::WebURLLoaderFactory>
RendererBlinkPlatformImpl::WrapSharedURLLoaderFactory(
    scoped_refptr<network::SharedURLLoaderFactory> factory) {
  return std::make_unique<WebURLLoaderFactoryImpl>(
      RenderThreadImpl::current()->resource_dispatcher()->GetWeakPtr(),
      std::move(factory));
}

scoped_refptr<ChildURLLoaderFactoryBundle>
RendererBlinkPlatformImpl::CreateDefaultURLLoaderFactoryBundle() {
  return base::MakeRefCounted<ChildURLLoaderFactoryBundle>(
      base::BindOnce(&RendererBlinkPlatformImpl::CreateNetworkURLLoaderFactory,
                     base::Unretained(this)));
}

mojo::PendingRemote<network::mojom::URLLoaderFactory>
RendererBlinkPlatformImpl::CreateNetworkURLLoaderFactory() {
  RenderThreadImpl* render_thread = RenderThreadImpl::current();
  DCHECK(render_thread);
  mojo::PendingRemote<network::mojom::URLLoaderFactory> factory_remote;
  ChildThread::Get()->BindHostReceiver(
      factory_remote.InitWithNewPipeAndPassReceiver());
  return factory_remote;
}

void RendererBlinkPlatformImpl::SetDisplayThreadPriority(
    base::PlatformThreadId thread_id) {
#if defined(OS_LINUX)
  if (RenderThreadImpl* render_thread = RenderThreadImpl::current()) {
    render_thread->render_message_filter()->SetThreadPriority(
        thread_id, base::ThreadPriority::DISPLAY);
  }
#endif
}

blink::BlameContext* RendererBlinkPlatformImpl::GetTopLevelBlameContext() {
  return &top_level_blame_context_;
}

blink::WebSandboxSupport* RendererBlinkPlatformImpl::GetSandboxSupport() {
#if defined(OS_LINUX) || defined(OS_MACOSX)
  return sandbox_support_.get();
#else
  // These platforms do not require sandbox support.
  return nullptr;
#endif
}

blink::WebThemeEngine* RendererBlinkPlatformImpl::ThemeEngine() {
  blink::WebThemeEngine* theme_engine =
      GetContentClient()->renderer()->OverrideThemeEngine();
  if (!theme_engine)
    theme_engine = BlinkPlatformImpl::ThemeEngine();
  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kForceHighContrast))
    theme_engine->SetForcedColors(blink::ForcedColors::kActive);
  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kForceDarkMode))
    theme_engine->SetPreferredColorScheme(blink::PreferredColorScheme::kDark);
  return theme_engine;
}

bool RendererBlinkPlatformImpl::sandboxEnabled() {
  // As explained in Platform.h, this function is used to decide
  // whether to allow file system operations to come out of WebKit or not.
  // Even if the sandbox is disabled, there's no reason why the code should
  // act any differently...unless we're in single process mode.  In which
  // case, we have no other choice.  Platform.h discourages using
  // this switch unless absolutely necessary, so hopefully we won't end up
  // with too many code paths being different in single-process mode.
  return !base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kSingleProcess);
}

uint64_t RendererBlinkPlatformImpl::VisitedLinkHash(const char* canonical_url,
                                                    size_t length) {
  return GetContentClient()->renderer()->VisitedLinkHash(canonical_url, length);
}

bool RendererBlinkPlatformImpl::IsLinkVisited(uint64_t link_hash) {
  return GetContentClient()->renderer()->IsLinkVisited(link_hash);
}

blink::WebPrescientNetworking*
RendererBlinkPlatformImpl::PrescientNetworking() {
  return GetContentClient()->renderer()->GetPrescientNetworking();
}

blink::WebString RendererBlinkPlatformImpl::UserAgent() {
  auto* render_thread = RenderThreadImpl::current();
  // RenderThreadImpl is null in some tests.
  if (!render_thread)
    return WebString();
  return render_thread->GetUserAgent();
}

blink::UserAgentMetadata RendererBlinkPlatformImpl::UserAgentMetadata() {
  auto* render_thread = RenderThreadImpl::current();
  // RenderThreadImpl is null in some tests.
  if (!render_thread)
    return blink::UserAgentMetadata();
  return render_thread->GetUserAgentMetadata();
}

void RendererBlinkPlatformImpl::CacheMetadata(
    blink::mojom::CodeCacheType cache_type,
    const blink::WebURL& url,
    base::Time response_time,
    const uint8_t* data,
    size_t size) {
  // Let the browser know we generated cacheable metadata for this resource.
  // The browser may cache it and return it on subsequent responses to speed
  // the processing of this resource.
  GetCodeCacheHost().DidGenerateCacheableMetadata(
      cache_type, url, response_time,
      mojo_base::BigBuffer(base::make_span(data, size)));
}

void RendererBlinkPlatformImpl::FetchCachedCode(
    blink::mojom::CodeCacheType cache_type,
    const GURL& url,
    FetchCachedCodeCallback callback) {
  GetCodeCacheHost().FetchCachedCode(
      cache_type, url,
      base::BindOnce(
          [](FetchCachedCodeCallback callback, base::Time time,
             mojo_base::BigBuffer data) {
            std::move(callback).Run(time, std::move(data));
          },
          std::move(callback)));
}

void RendererBlinkPlatformImpl::ClearCodeCacheEntry(
    blink::mojom::CodeCacheType cache_type,
    const GURL& url) {
  GetCodeCacheHost().ClearCodeCacheEntry(cache_type, url);
}

void RendererBlinkPlatformImpl::CacheMetadataInCacheStorage(
    const blink::WebURL& url,
    base::Time response_time,
    const uint8_t* data,
    size_t size,
    const blink::WebSecurityOrigin& cacheStorageOrigin,
    const blink::WebString& cacheStorageCacheName) {
  // Let the browser know we generated cacheable metadata for this resource in
  // CacheStorage. The browser may cache it and return it on subsequent
  // responses to speed the processing of this resource.
  GetCodeCacheHost().DidGenerateCacheableMetadataInCacheStorage(
      url, response_time, mojo_base::BigBuffer(base::make_span(data, size)),
      cacheStorageOrigin, cacheStorageCacheName.Utf8());
}

WebString RendererBlinkPlatformImpl::DefaultLocale() {
  return WebString::FromASCII(RenderThread::Get()->GetLocale());
}

void RendererBlinkPlatformImpl::SuddenTerminationChanged(bool enabled) {
  if (enabled) {
    // We should not get more enables than disables, but we want it to be a
    // non-fatal error if it does happen.
    DCHECK_GT(sudden_termination_disables_, 0);
    sudden_termination_disables_ = std::max(sudden_termination_disables_ - 1,
                                            0);
    if (sudden_termination_disables_ != 0)
      return;
  } else {
    sudden_termination_disables_++;
    if (sudden_termination_disables_ != 1)
      return;
  }

  RenderThreadImpl* thread = RenderThreadImpl::current();
  if (thread)  // NULL in unittests.
    thread->GetRendererHost()->SuddenTerminationChanged(enabled);
}

//------------------------------------------------------------------------------

WebString RendererBlinkPlatformImpl::FileSystemCreateOriginIdentifier(
    const blink::WebSecurityOrigin& origin) {
  return WebString::FromUTF8(
      storage::GetIdentifierFromOrigin(WebSecurityOriginToGURL(origin)));
}

//------------------------------------------------------------------------------

WebString RendererBlinkPlatformImpl::DatabaseCreateOriginIdentifier(
    const blink::WebSecurityOrigin& origin) {
  return WebString::FromUTF8(
      storage::GetIdentifierFromOrigin(WebSecurityOriginToGURL(origin)));
}

viz::FrameSinkId RendererBlinkPlatformImpl::GenerateFrameSinkId() {
  return viz::FrameSinkId(RenderThread::Get()->GetClientId(),
                          RenderThread::Get()->GenerateRoutingID());
}

bool RendererBlinkPlatformImpl::IsLockedToSite() const {
  return is_locked_to_site_;
}

void RendererBlinkPlatformImpl::SetIsLockedToSite() {
  is_locked_to_site_ = true;
}

bool RendererBlinkPlatformImpl::IsGpuCompositingDisabled() {
  DCHECK_CALLED_ON_VALID_THREAD(main_thread_checker_);
  RenderThreadImpl* thread = RenderThreadImpl::current();
  // |thread| can be NULL in tests.
  return !thread || thread->IsGpuCompositingDisabled();
}

bool RendererBlinkPlatformImpl::IsThreadedAnimationEnabled() {
  RenderThreadImpl* thread = RenderThreadImpl::current();
  return thread ? thread->IsThreadedAnimationEnabled() : true;
}

double RendererBlinkPlatformImpl::AudioHardwareSampleRate() {
  return GetAudioHardwareParams().sample_rate();
}

size_t RendererBlinkPlatformImpl::AudioHardwareBufferSize() {
  return GetAudioHardwareParams().frames_per_buffer();
}

unsigned RendererBlinkPlatformImpl::AudioHardwareOutputChannels() {
  return GetAudioHardwareParams().channels();
}

std::unique_ptr<WebAudioDevice> RendererBlinkPlatformImpl::CreateAudioDevice(
    unsigned input_channels,
    unsigned channels,
    const blink::WebAudioLatencyHint& latency_hint,
    WebAudioDevice::RenderCallback* callback,
    const blink::WebString& input_device_id) {
  // The |channels| does not exactly identify the channel layout of the
  // device. The switch statement below assigns a best guess to the channel
  // layout based on number of channels.
  media::ChannelLayout layout = media::GuessChannelLayout(channels);
  if (layout == media::CHANNEL_LAYOUT_UNSUPPORTED)
    layout = media::CHANNEL_LAYOUT_DISCRETE;

  return RendererWebAudioDeviceImpl::Create(
      layout, channels, latency_hint, callback,
      /*session_id=*/base::UnguessableToken());
}

bool RendererBlinkPlatformImpl::DecodeAudioFileData(
    blink::WebAudioBus* destination_bus,
    const char* audio_file_data,
    size_t data_size) {
  return content::DecodeAudioFileData(destination_bus, audio_file_data,
                                      data_size);
}

//------------------------------------------------------------------------------

scoped_refptr<media::AudioCapturerSource>
RendererBlinkPlatformImpl::NewAudioCapturerSource(
    blink::WebLocalFrame* web_frame,
    const media::AudioSourceParameters& params) {
  return AudioDeviceFactory::NewAudioCapturerSource(
      RenderFrame::GetRoutingIdForWebFrame(web_frame), params);
}

viz::ContextProvider*
RendererBlinkPlatformImpl::SharedMainThreadContextProvider() {
  return RenderThreadImpl::current()->SharedMainThreadContextProvider().get();
}

bool RendererBlinkPlatformImpl::RTCSmoothnessAlgorithmEnabled() {
  return !base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kDisableRTCSmoothnessAlgorithm);
}

//------------------------------------------------------------------------------

base::Optional<double>
RendererBlinkPlatformImpl::GetWebRtcMaxCaptureFrameRate() {
  const std::string max_fps_str =
      base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
          switches::kWebRtcMaxCaptureFramerate);
  if (!max_fps_str.empty()) {
    double value;
    if (base::StringToDouble(max_fps_str, &value) && value >= 0.0)
      return value;
  }
  return base::nullopt;
}

scoped_refptr<media::AudioRendererSink>
RendererBlinkPlatformImpl::NewAudioRendererSink(
    blink::WebAudioDeviceSourceType source_type,
    blink::WebLocalFrame* web_frame,
    const media::AudioSinkParameters& params) {
  return AudioDeviceFactory::NewAudioRendererSink(
      source_type, RenderFrame::GetRoutingIdForWebFrame(web_frame), params);
}

media::AudioLatency::LatencyType
RendererBlinkPlatformImpl::GetAudioSourceLatencyType(
    blink::WebAudioDeviceSourceType source_type) {
  return AudioDeviceFactory::GetSourceLatencyType(source_type);
}

base::Optional<std::string>
RendererBlinkPlatformImpl::GetWebRTCAudioProcessingConfiguration() {
  return GetContentClient()
      ->renderer()
      ->WebRTCPlatformSpecificAudioProcessingConfiguration();
}

bool RendererBlinkPlatformImpl::ShouldEnforceWebRTCRoutingPreferences() {
  return GetContentClient()
      ->renderer()
      ->ShouldEnforceWebRTCRoutingPreferences();
}

bool RendererBlinkPlatformImpl::UsesFakeCodecForPeerConnection() {
  return base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kUseFakeCodecForPeerConnection);
}

bool RendererBlinkPlatformImpl::IsWebRtcEncryptionEnabled() {
  return !base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kDisableWebRtcEncryption);
}

bool RendererBlinkPlatformImpl::IsWebRtcStunOriginEnabled() {
  return base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kEnableWebRtcStunOrigin);
}

base::Optional<std::string>
RendererBlinkPlatformImpl::WebRtcStunProbeTrialParameter() {
  const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
  if (!cmd_line->HasSwitch(switches::kWebRtcStunProbeTrialParameter))
    return base::nullopt;

  return cmd_line->GetSwitchValueASCII(
      switches::kWebRtcStunProbeTrialParameter);
}

media::MediaPermission* RendererBlinkPlatformImpl::GetWebRTCMediaPermission(
    blink::WebLocalFrame* web_frame) {
  DCHECK(ShouldEnforceWebRTCRoutingPreferences());

  media::MediaPermission* media_permission = nullptr;
  bool create_media_permission =
      base::CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kEnforceWebRtcIPPermissionCheck);
  create_media_permission =
      create_media_permission ||
      !StartsWith(
          base::FieldTrialList::FindFullName("WebRTC-LocalIPPermissionCheck"),
          "Disabled", base::CompareCase::SENSITIVE);
  if (create_media_permission) {
    RenderFrameImpl* render_frame = RenderFrameImpl::FromWebFrame(web_frame);
    if (render_frame)
      media_permission = render_frame->GetMediaPermission();
    DCHECK(media_permission);
  }

  return media_permission;
}

void RendererBlinkPlatformImpl::GetWebRTCRendererPreferences(
    blink::WebLocalFrame* web_frame,
    blink::WebString* ip_handling_policy,
    uint16_t* udp_min_port,
    uint16_t* udp_max_port,
    bool* allow_mdns_obfuscation) {
  DCHECK(ip_handling_policy);
  DCHECK(udp_min_port);
  DCHECK(udp_max_port);
  DCHECK(allow_mdns_obfuscation);

  auto* render_frame = RenderFrameImpl::FromWebFrame(web_frame);
  if (!render_frame)
    return;

  *ip_handling_policy = blink::WebString::FromUTF8(
      render_frame->GetRendererPreferences().webrtc_ip_handling_policy);
  *udp_min_port = render_frame->GetRendererPreferences().webrtc_udp_min_port;
  *udp_max_port = render_frame->GetRendererPreferences().webrtc_udp_max_port;
  const std::vector<std::string>& allowed_urls =
      render_frame->GetRendererPreferences().webrtc_local_ips_allowed_urls;
  const std::string url(web_frame->GetSecurityOrigin().ToString().Utf8());
  for (const auto& allowed_url : allowed_urls) {
    if (base::MatchPattern(url, allowed_url)) {
      *allow_mdns_obfuscation = false;
      return;
    }
  }
  *allow_mdns_obfuscation = true;
}

base::Optional<int> RendererBlinkPlatformImpl::GetAgcStartupMinimumVolume() {
  std::string min_volume_str =
      base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
          switches::kAgcStartupMinVolume);
  int startup_min_volume;
  if (min_volume_str.empty() ||
      !base::StringToInt(min_volume_str, &startup_min_volume)) {
    return base::Optional<int>();
  }
  return base::Optional<int>(startup_min_volume);
}

bool RendererBlinkPlatformImpl::IsWebRtcHWH264DecodingEnabled(
    webrtc::VideoCodecType video_codec_type) {
#if defined(OS_WIN)
  // Do not use hardware decoding for H.264 on Win7, due to high latency.
  // See https://crbug.com/webrtc/5717.
  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kEnableWin7WebRtcHWH264Decoding) &&
      video_codec_type == webrtc::kVideoCodecH264 &&
      base::win::GetVersion() == base::win::Version::WIN7) {
    DVLOG(1) << "H.264 HW decoding is not supported on Win7";
    return false;
  }
#endif  // defined(OS_WIN)
  return true;
}

bool RendererBlinkPlatformImpl::IsWebRtcHWEncodingEnabled() {
  return !base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kDisableWebRtcHWEncoding);
}

bool RendererBlinkPlatformImpl::IsWebRtcHWDecodingEnabled() {
  return !base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kDisableWebRtcHWDecoding);
}

bool RendererBlinkPlatformImpl::IsWebRtcSrtpAesGcmEnabled() {
  return base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kEnableWebRtcSrtpAesGcm);
}

bool RendererBlinkPlatformImpl::IsWebRtcSrtpEncryptedHeadersEnabled() {
  return base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kEnableWebRtcSrtpEncryptedHeaders);
}

bool RendererBlinkPlatformImpl::AllowsLoopbackInPeerConnection() {
  return base::CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kAllowLoopbackInPeerConnection);
}

blink::WebVideoCaptureImplManager*
RendererBlinkPlatformImpl::GetVideoCaptureImplManager() {
  RenderThreadImpl* thread = RenderThreadImpl::current();
  return thread ? thread->video_capture_impl_manager() : nullptr;
}

//------------------------------------------------------------------------------

static void Collect3DContextInformation(
    blink::Platform::GraphicsInfo* gl_info,
    const gpu::GPUInfo& gpu_info) {
  DCHECK(gl_info);
  const gpu::GPUInfo::GPUDevice& active_gpu = gpu_info.active_gpu();
  gl_info->vendor_id = active_gpu.vendor_id;
  gl_info->device_id = active_gpu.device_id;
  gl_info->renderer_info = WebString::FromUTF8(gpu_info.gl_renderer);
  gl_info->vendor_info = WebString::FromUTF8(gpu_info.gl_vendor);
  gl_info->driver_version = WebString::FromUTF8(active_gpu.driver_version);
  gl_info->reset_notification_strategy =
      gpu_info.gl_reset_notification_strategy;
  gl_info->sandboxed = gpu_info.sandboxed;
  gl_info->amd_switchable = gpu_info.amd_switchable;
  gl_info->optimus = gpu_info.optimus;
}

std::unique_ptr<blink::WebGraphicsContext3DProvider>
RendererBlinkPlatformImpl::CreateOffscreenGraphicsContext3DProvider(
    const blink::Platform::ContextAttributes& web_attributes,
    const blink::WebURL& top_document_web_url,
    blink::Platform::GraphicsInfo* gl_info) {
  DCHECK(gl_info);
  if (!RenderThreadImpl::current()) {
    std::string error_message("Failed to run in Current RenderThreadImpl");
    gl_info->error_message = WebString::FromUTF8(error_message);
    return nullptr;
  }

  scoped_refptr<gpu::GpuChannelHost> gpu_channel_host(
      RenderThreadImpl::current()->EstablishGpuChannelSync());
  if (!gpu_channel_host) {
    std::string error_message(
        "OffscreenContext Creation failed, GpuChannelHost creation failed");
    gl_info->error_message = WebString::FromUTF8(error_message);
    return nullptr;
  }
  Collect3DContextInformation(gl_info, gpu_channel_host->gpu_info());

  // This is an offscreen context. Generally it won't use the default
  // frame buffer, in that case don't request any alpha, depth, stencil,
  // antialiasing. But we do need those attributes for the "own
  // offscreen surface" optimization which supports directly drawing
  // to a custom surface backed frame buffer.
  gpu::ContextCreationAttribs attributes;
  attributes.alpha_size = web_attributes.support_alpha ? 8 : -1;
  attributes.depth_size = web_attributes.support_depth ? 24 : 0;
  attributes.stencil_size = web_attributes.support_stencil ? 8 : 0;
  attributes.samples = web_attributes.support_antialias ? 4 : 0;
  attributes.own_offscreen_surface =
      web_attributes.support_alpha || web_attributes.support_depth ||
      web_attributes.support_stencil || web_attributes.support_antialias;
  attributes.sample_buffers = 0;
  attributes.bind_generates_resource = false;
  attributes.enable_raster_interface = web_attributes.enable_raster_interface;

  attributes.gpu_preference = web_attributes.prefer_low_power_gpu
                                  ? gl::GpuPreference::kLowPower
                                  : gl::GpuPreference::kHighPerformance;

  attributes.fail_if_major_perf_caveat =
      web_attributes.fail_if_major_performance_caveat;

  attributes.context_type = ToGpuContextType(web_attributes.context_type);

  constexpr bool automatic_flushes = true;
  constexpr bool support_locking = false;

  scoped_refptr<viz::ContextProviderCommandBuffer> provider(
      new viz::ContextProviderCommandBuffer(
          std::move(gpu_channel_host),
          RenderThreadImpl::current()->GetGpuMemoryBufferManager(),
          kGpuStreamIdDefault, kGpuStreamPriorityDefault,
          gpu::kNullSurfaceHandle, GURL(top_document_web_url),
          automatic_flushes, support_locking, web_attributes.support_grcontext,
          gpu::SharedMemoryLimits(), attributes,
          viz::command_buffer_metrics::ContextType::WEBGL));
  return std::make_unique<WebGraphicsContext3DProviderImpl>(
      std::move(provider));
}

//------------------------------------------------------------------------------

std::unique_ptr<blink::WebGraphicsContext3DProvider>
RendererBlinkPlatformImpl::CreateSharedOffscreenGraphicsContext3DProvider() {
  auto* thread = RenderThreadImpl::current();

  scoped_refptr<viz::ContextProviderCommandBuffer> provider =
      thread->SharedMainThreadContextProvider();
  if (!provider)
    return nullptr;

  scoped_refptr<gpu::GpuChannelHost> host = thread->EstablishGpuChannelSync();
  // This shouldn't normally fail because we just got |provider|. But the
  // channel can become lost on the IO thread since then. It is important that
  // this happens after getting |provider|. In the case that this GpuChannelHost
  // is not the same one backing |provider|, the context behind the |provider|
  // will be already lost/dead on arrival.
  if (!host)
    return nullptr;

  return std::make_unique<WebGraphicsContext3DProviderImpl>(
      std::move(provider));
}

//------------------------------------------------------------------------------

std::unique_ptr<blink::WebGraphicsContext3DProvider>
RendererBlinkPlatformImpl::CreateWebGPUGraphicsContext3DProvider(
    const blink::WebURL& top_document_web_url) {
#if !BUILDFLAG(USE_DAWN)
  return nullptr;
#else
  scoped_refptr<gpu::GpuChannelHost> gpu_channel_host(
      RenderThreadImpl::current()->EstablishGpuChannelSync());
  if (!gpu_channel_host) {
    // TODO(crbug.com/973017): Collect GPU info and surface context creation
    // error.
    return nullptr;
  }

  gpu::ContextCreationAttribs attributes;
  // TODO(kainino): It's not clear yet how GPU preferences work for WebGPU.
  attributes.gpu_preference = gl::GpuPreference::kHighPerformance;
  attributes.enable_gles2_interface = false;
  attributes.context_type = gpu::CONTEXT_TYPE_WEBGPU;

  constexpr bool automatic_flushes = true;
  constexpr bool support_locking = false;
  constexpr bool support_grcontext = false;

  scoped_refptr<viz::ContextProviderCommandBuffer> provider(
      new viz::ContextProviderCommandBuffer(
          std::move(gpu_channel_host),
          RenderThreadImpl::current()->GetGpuMemoryBufferManager(),
          kGpuStreamIdDefault, kGpuStreamPriorityDefault,
          gpu::kNullSurfaceHandle, GURL(top_document_web_url),
          automatic_flushes, support_locking, support_grcontext,
          gpu::SharedMemoryLimits::ForWebGPUContext(), attributes,
          viz::command_buffer_metrics::ContextType::WEBGPU));
  return std::make_unique<WebGraphicsContext3DProviderImpl>(
      std::move(provider));
#endif
}

//------------------------------------------------------------------------------

gpu::GpuMemoryBufferManager*
RendererBlinkPlatformImpl::GetGpuMemoryBufferManager() {
  RenderThreadImpl* thread = RenderThreadImpl::current();
  return thread ? thread->GetGpuMemoryBufferManager() : nullptr;
}

//------------------------------------------------------------------------------

blink::WebString RendererBlinkPlatformImpl::ConvertIDNToUnicode(
    const blink::WebString& host) {
  return WebString::FromUTF16(url_formatter::IDNToUnicode(host.Ascii()));
}

//------------------------------------------------------------------------------

void RendererBlinkPlatformImpl::RecordRappor(const char* metric,
                                             const blink::WebString& sample) {
  GetContentClient()->renderer()->RecordRappor(metric, sample.Utf8());
}

void RendererBlinkPlatformImpl::RecordRapporURL(const char* metric,
                                                const blink::WebURL& url) {
  GetContentClient()->renderer()->RecordRapporURL(metric, url);
}

//------------------------------------------------------------------------------

std::unique_ptr<blink::WebDedicatedWorkerHostFactoryClient>
RendererBlinkPlatformImpl::CreateDedicatedWorkerHostFactoryClient(
    blink::WebDedicatedWorker* worker,
    const blink::BrowserInterfaceBrokerProxy& interface_broker) {
  return std::make_unique<DedicatedWorkerHostFactoryClient>(worker,
                                                            interface_broker);
}

void RendererBlinkPlatformImpl::DidStartWorkerThread() {
  WorkerThreadRegistry::Instance()->DidStartCurrentWorkerThread();
}

void RendererBlinkPlatformImpl::WillStopWorkerThread() {
  WorkerThreadRegistry::Instance()->WillStopCurrentWorkerThread();
}

void RendererBlinkPlatformImpl::WorkerContextCreated(
    const v8::Local<v8::Context>& worker) {
  GetContentClient()->renderer()->DidInitializeWorkerContextOnWorkerThread(
      worker);
}

bool RendererBlinkPlatformImpl::IsExcludedHeaderForServiceWorkerFetchEvent(
    const blink::WebString& header_name) {
  return GetContentClient()
      ->renderer()
      ->IsExcludedHeaderForServiceWorkerFetchEvent(header_name.Ascii());
}

//------------------------------------------------------------------------------

void RendererBlinkPlatformImpl::RecordMetricsForBackgroundedRendererPurge() {
  auto* render_thread = RenderThreadImpl::current();
  // RenderThreadImpl is null in some tests.
  if (!render_thread)
    return;
  render_thread->RecordMetricsForBackgroundedRendererPurge();
}

//------------------------------------------------------------------------------
media::GpuVideoAcceleratorFactories*
RendererBlinkPlatformImpl::GetGpuFactories() {
  auto* render_thread = RenderThreadImpl::current();
  if (!render_thread)
    return nullptr;

  return render_thread->GetGpuFactories();
}

//------------------------------------------------------------------------------

blink::mojom::CodeCacheHost& RendererBlinkPlatformImpl::GetCodeCacheHost() {
  if (!code_cache_host_) {
    code_cache_host_ = mojo::SharedRemote<blink::mojom::CodeCacheHost>(
        std::move(code_cache_host_remote_),
        base::CreateSequencedTaskRunner(
            {base::ThreadPool(), base::WithBaseSyncPrimitives()}));
  }
  return *code_cache_host_;
}

}  // namespace content