Fix webrtcAudioPrivate API to handle requests from <webview>s.

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 11bc13f3900fb2540385b2c7f12149b005fa3793..21581dcc8b5bf9ca7a6525cb084473eacf9a558a 100644
--- a/content/browser/renderer_host/media/audio_renderer_host.h
+++ b/content/browser/renderer_host/media/audio_renderer_host.h
@@ -48,7 +48,7 @@
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/browser_thread.h"
-#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/render_process_host.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_logging.h"
 #include "media/audio/audio_output_controller.h"
@@ -77,8 +77,8 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
 
   // Calls |callback| with the list of AudioOutputControllers for this object.
   void GetOutputControllers(
-      int render_view_id,
-      const RenderViewHost::GetAudioOutputControllersCallback& callback) const;
+      const RenderProcessHost::GetAudioOutputControllersCallback& callback)
+      const;

[jam, 2015/01/29 00:19:04]

nit: this looks odd to start a line with "const". why not start with "callback)
const;"?

 
   // BrowserMessageFilter implementation.
   void OnChannelClosing() override;
@@ -144,8 +144,7 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   // Send playing/paused status to the renderer.
   void DoNotifyStreamStateChanged(int stream_id, bool is_playing);
 
-  RenderViewHost::AudioOutputControllerList DoGetOutputControllers(
-      int render_view_id) const;
+  RenderProcessHost::AudioOutputControllerList DoGetOutputControllers() const;
 
   // Send an error message to the renderer.
   void SendErrorMessage(int stream_id);