blob: 950200bd57bdf51851a55eaec0d80410ea2ea052 [file] [log] [blame]
// Copyright 2015 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 <string>
#include "base/memory/ref_counted.h"
#include "build/build_config.h"
#include "content/common/content_export.h"
#include "ipc/ipc_sender.h"
#if defined(OS_WIN)
#include <windows.h>
namespace base {
class SingleThreadTaskRunner;
struct UserMetricsAction;
namespace service_manager {
class Connector;
namespace content {
class ServiceManagerConnection;
// An abstract base class that contains logic shared between most child
// processes of the embedder.
class CONTENT_EXPORT ChildThread : public IPC::Sender {
// Returns the one child thread for this process. Note that this can only be
// accessed when running on the child thread itself.
static ChildThread* Get();
~ChildThread() override {}
#if defined(OS_WIN)
// Request that the given font be loaded by the browser so it's cached by the
// OS. Please see ChildProcessHost::PreCacheFont for details.
virtual void PreCacheFont(const LOGFONT& log_font) = 0;
// Release cached font.
virtual void ReleaseCachedFonts() = 0;
// Sends over a base::UserMetricsAction to be recorded by user metrics as
// an action. Once a new user metric is added, run
// tools/metrics/actions/
// to add the metric to actions.xml, then update the <owner>s and
// <description> sections. Make sure to include the actions.xml file when you
// upload your code for review!
// WARNING: When using base::UserMetricsAction, base::UserMetricsAction
// and a string literal parameter must be on the same line, e.g.
// RenderThread::Get()->RecordAction(
// base::UserMetricsAction("my extremely long action name"));
// because otherwise our processing scripts won't pick up on new actions.
virtual void RecordAction(const base::UserMetricsAction& action) = 0;
// Sends over a string to be recorded by user metrics as a computed action.
// When you use this you need to also update the rules for extracting known
// actions in chrome/tools/
virtual void RecordComputedAction(const std::string& action) = 0;
// Returns the ServiceManagerConnection for the thread (from which a
// service_manager::Connector can be obtained).
virtual ServiceManagerConnection* GetServiceManagerConnection() = 0;
// Returns a connector that can be used to bind interfaces exposed by other
// services.
virtual service_manager::Connector* GetConnector() = 0;
virtual scoped_refptr<base::SingleThreadTaskRunner> GetIOTaskRunner() = 0;
} // namespace content