Sixth patch in getting rid of caching MessageLoop pointers. Audio and automa...

chrome/browser/renderer_host/audio_renderer_host.h

 // Copyright (c) 2009 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.
 //
 // AudioRendererHost serves audio related requests from AudioRenderer which
 // lives inside the render process and provide access to audio hardware. It maps
 // an internal ID to AudioRendererHost::IPCAudioSource in a map, which is the
 // actual object providing audio packets through IPC. It creates the actual
 // AudioOutputStream object when requested by the renderer provided with
 // render view id and stream id.
@@ skipping 62 matching lines @@
 #include "base/process.h"
 #include "base/ref_counted.h"
 #include "base/shared_memory.h"
 #include "base/waitable_event.h"
 #include "ipc/ipc_message.h"
 #include "media/audio/audio_output.h"
 #include "media/audio/simple_sources.h"
 #include "testing/gtest/include/gtest/gtest_prod.h"
 
 class AudioManager;
-class MessageLoop;
 struct ViewHostMsg_Audio_CreateStream;
 
 class AudioRendererHost : public base::RefCountedThreadSafe<AudioRendererHost> {
  private:
   class IPCAudioSource;
  public:
   // Called from UI thread from the owner of this object.
-  explicit AudioRendererHost(MessageLoop* message_loop);
+  AudioRendererHost();
 
   // Destruction can happen on either UI thread or IO thread, but at destruction
   // all associated sources are destroyed and streams are closed.
   virtual ~AudioRendererHost();
 
   // Called from UI thread from the owner of this object to kick start
   // destruction of streams in IO thread.
   void Destroy();
 
   //---------------------------------------------------------------------------
@@ skipping 231 matching lines @@
   void OnDestroySource(IPCAudioSource* source);
 
   // A helper method that destroy all IPCAudioSource and associated audio
   // output streams.
   void DestroyAllSources();
 
   // A helper method to look up a IPCAudioSource with a tuple of render view id
   // and stream id. Returns NULL if not found.
   IPCAudioSource* Lookup(int render_view_id, int stream_id);
 
-  MessageLoop* io_loop() { return io_loop_; }
-
   int process_id_;
   base::ProcessHandle process_handle_;
   IPC::Message::Sender* ipc_sender_;
 
   // A map of id to audio sources.
   typedef std::pair<int32, int32> SourceID;
   typedef std::map<SourceID, IPCAudioSource*> SourceMap;
   SourceMap sources_;
 
-  MessageLoop* io_loop_;
-
   DISALLOW_COPY_AND_ASSIGN(AudioRendererHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_AUDIO_RENDERER_HOST_H_