Merge AssociateStreamWithProducer message into CreateStream message for both audio output and input.

content/renderer/media/audio_input_message_filter.h

Index: content/renderer/media/audio_input_message_filter.h
diff --git a/content/renderer/media/audio_input_message_filter.h b/content/renderer/media/audio_input_message_filter.h
index 82af71e8717f3975770a556a79e2fe5ca80fa186..1715bc2e00436ab9b09ed6cb0d9dfb7ae3da1b87 100644
--- a/content/renderer/media/audio_input_message_filter.h
+++ b/content/renderer/media/audio_input_message_filter.h
@@ -6,6 +6,7 @@
 #define CONTENT_RENDERER_MEDIA_AUDIO_INPUT_MESSAGE_FILTER_H_
 
 #include "base/id_map.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/sync_socket.h"
 #include "content/common/content_export.h"
@@ -23,8 +24,7 @@ namespace content {
 // IO thread (secondary thread of render process), it intercepts audio messages
 // and process them on IO thread since these messages are time critical.
 class CONTENT_EXPORT AudioInputMessageFilter
-    : public IPC::ChannelProxy::MessageFilter,
-      public NON_EXPORTED_BASE(media::AudioInputIPC) {
+    : public IPC::ChannelProxy::MessageFilter {
  public:
   explicit AudioInputMessageFilter(
       const scoped_refptr<base::MessageLoopProxy>& io_message_loop);
@@ -32,26 +32,22 @@ class CONTENT_EXPORT AudioInputMessageFilter
   // Getter for the one AudioInputMessageFilter object.
   static AudioInputMessageFilter* Get();
 
-  // Associates |render_view_id| as the destination of audio for a stream.
-  void AssociateStreamWithConsumer(int stream_id, int render_view_id);
-
-  // Implementation of AudioInputIPC.  All methods must be called on the
-  // provided |io_message_loop|.
-  virtual int AddDelegate(
-      media::AudioInputIPCDelegate* delegate) OVERRIDE;
-  virtual void RemoveDelegate(int id) OVERRIDE;
-  virtual void CreateStream(int stream_id, const media::AudioParameters& params,
-      const std::string& device_id, bool automatic_gain_control) OVERRIDE;
-  virtual void StartDevice(int stream_id, int session_id) OVERRIDE;
-  virtual void RecordStream(int stream_id) OVERRIDE;
-  virtual void CloseStream(int stream_id) OVERRIDE;
-  virtual void SetVolume(int stream_id, double volume) OVERRIDE;
+  // Create an AudioInputIPC to be owned by one delegate.  |render_view_id| is
+  // the render view containing the entity consuming the audio.
+  //
+  // The returned object is not thread-safe, and must be used on
+  // |io_message_loop|.
+  scoped_ptr<media::AudioInputIPC> CreateAudioInputIPC(int render_view_id);
 
   scoped_refptr<base::MessageLoopProxy> io_message_loop() const {
     return io_message_loop_;
   }
 
  private:
+  // Implementation of media::AudioInputIPC which augments IPC calls with
+  // stream_id and the destination render_view_id.
+  class AudioInputIPCImpl;
+
   virtual ~AudioInputMessageFilter();
 
   // Sends an IPC message using |channel_|.
@@ -89,9 +85,6 @@ class CONTENT_EXPORT AudioInputMessageFilter
   // IPC channel for Send(), must only be accesed on |io_message_loop_|.
   IPC::Channel* channel_;
 
-  // The singleton instance for this filter.
-  static AudioInputMessageFilter* filter_;
-
   // Message loop on which IPC calls are driven.
   const scoped_refptr<base::MessageLoopProxy> io_message_loop_;