Reland 15721002: Hook up the device selection to the WebAudio live audio

content/browser/renderer_host/media/audio_renderer_host.h

Index: content/browser/renderer_host/media/audio_renderer_host.h
diff --git a/content/browser/renderer_host/media/audio_renderer_host.h b/content/browser/renderer_host/media/audio_renderer_host.h
index 803539cf48a1c7bdd331ff28e27fd03338ce0b18..b249ef418ceece4bcbffd7a1cf8bae03c73a1fe6 100644
--- a/content/browser/renderer_host/media/audio_renderer_host.h
+++ b/content/browser/renderer_host/media/audio_renderer_host.h
@@ -61,6 +61,7 @@ namespace content {
 
 class AudioMirroringManager;
 class MediaInternals;
+class MediaStreamManager;
 class ResourceContext;
 
 class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
@@ -69,7 +70,8 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   AudioRendererHost(int render_process_id,
                     media::AudioManager* audio_manager,
                     AudioMirroringManager* mirroring_manager,
-                    MediaInternals* media_internals);
+                    MediaInternals* media_internals,
+                    MediaStreamManager* media_stream_manager);
 
   // BrowserMessageFilter implementation.
   virtual void OnChannelClosing() OVERRIDE;
@@ -96,10 +98,14 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
 
   // Creates an audio output stream with the specified format whose data is
   // produced by an entity in the render view referenced by |render_view_id|.
+  // |session_id| is used for unified IO to find out which input device to be
+  // opened for the stream. For clients that do not use unified IO,
+  // |session_id| will be ignored.
   // Upon success/failure, the peer is notified via the NotifyStreamCreated
   // message.
   void OnCreateStream(int stream_id,
                       int render_view_id,
+                      int session_id,
                       const media::AudioParameters& params);
 
   // Play the audio stream referenced by |stream_id|.
@@ -143,6 +149,9 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   AudioMirroringManager* const mirroring_manager_;
   MediaInternals* const media_internals_;
 
+  // Used to access to AudioInputDeviceManager.
+  MediaStreamManager* media_stream_manager_;
+
   // A map of stream IDs to audio sources.
   AudioEntryMap audio_entries_;