Move a bunch of html5 renderer code to content.

chrome/renderer/audio_message_filter.h

-// Copyright (c) 2010 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.
-//
-// MessageFilter that handles audio messages and delegates them to audio
-// renderers. Created on render thread, AudioMessageFilter is operated on
-// IO thread (main thread of render process), it intercepts audio messages
-// and process them on IO thread since these messages are time critical.
-
-#ifndef CHROME_RENDERER_AUDIO_MESSAGE_FILTER_H_
-#define CHROME_RENDERER_AUDIO_MESSAGE_FILTER_H_
-#pragma once
-
-#include "base/gtest_prod_util.h"
-#include "base/id_map.h"
-#include "base/shared_memory.h"
-#include "base/sync_socket.h"
-#include "ipc/ipc_channel_proxy.h"
-#include "media/audio/audio_buffers_state.h"
-
-struct ViewMsg_AudioStreamState_Params;
-
-namespace base {
-class Time;
-}
-
-class AudioMessageFilter : public IPC::ChannelProxy::MessageFilter {
- public:
-  class Delegate {
-   public:
-    // Called when an audio packet is requested from the browser process.
-    virtual void OnRequestPacket(AudioBuffersState buffers_state) = 0;
-
-    // Called when state of an audio stream has changed in the browser process.
-    virtual void OnStateChanged(
-        const ViewMsg_AudioStreamState_Params& state) = 0;
-
-    // Called when an audio stream has been created in the browser process.
-    virtual void OnCreated(base::SharedMemoryHandle handle, uint32 length) = 0;
-
-    // Called when a low-latency audio stream has been created in the browser
-    // process.
-    virtual void OnLowLatencyCreated(base::SharedMemoryHandle handle,
-                                     base::SyncSocket::Handle socket_handle,
-                                     uint32 length) = 0;
-
-    // Called when notification of stream volume is received from the browser
-    // process.
-    virtual void OnVolume(double volume) = 0;
-
-   protected:
-    virtual ~Delegate() {}
-  };
-
-  explicit AudioMessageFilter(int32 route_id);
-  ~AudioMessageFilter();
-
-  // Add a delegate to the map and return id of the entry.
-  int32 AddDelegate(Delegate* delegate);
-
-  // Remove a delegate referenced by |id| from the map.
-  void RemoveDelegate(int32 id);
-
-  // Sends an IPC message using |channel_|.
-  bool Send(IPC::Message* message);
-
-  MessageLoop* message_loop() { return message_loop_; }
-
- private:
-  // For access to |message_loop_|.
-  friend class AudioRendererImplTest;
-
-  FRIEND_TEST_ALL_PREFIXES(AudioMessageFilterTest, Basic);
-  FRIEND_TEST_ALL_PREFIXES(AudioMessageFilterTest, Delegates);
-
-  // IPC::ChannelProxy::MessageFilter override. Called on IO thread.
-  virtual bool OnMessageReceived(const IPC::Message& message);
-  virtual void OnFilterAdded(IPC::Channel* channel);
-  virtual void OnFilterRemoved();
-  virtual void OnChannelClosing();
-
-  // Received when browser process wants more audio packet.
-  void OnRequestPacket(const IPC::Message& msg, int stream_id,
-                       AudioBuffersState buffers_state);
-
-  // Received when browser process has created an audio output stream.
-  void OnStreamCreated(int stream_id, base::SharedMemoryHandle handle,
-                       uint32 length);
-
-  // Received when browser process has created an audio output stream of low
-  // latency.
-  void OnLowLatencyStreamCreated(int stream_id, base::SharedMemoryHandle handle,
-#if defined(OS_WIN)
-                                 base::SyncSocket::Handle socket_handle,
-#else
-                                 base::FileDescriptor socket_descriptor,
-#endif
-                                 uint32 length);
-
-
-  // Received when internal state of browser process' audio output device has
-  // changed.
-  void OnStreamStateChanged(int stream_id,
-                            const ViewMsg_AudioStreamState_Params& state);
-
-  // Notification of volume property of an audio output stream.
-  void OnStreamVolume(int stream_id, double volume);
-
-  // A map of stream ids to delegates.
-  IDMap<Delegate> delegates_;
-
-  IPC::Channel* channel_;
-
-  int32 route_id_;
-
-  MessageLoop* message_loop_;
-
-  DISALLOW_COPY_AND_ASSIGN(AudioMessageFilter);
-};
-
-#endif  // CHROME_RENDERER_AUDIO_MESSAGE_FILTER_H_