Plumb render view ID to media observer

content/renderer/media/render_audiosourceprovider.cc

Index: content/renderer/media/render_audiosourceprovider.cc
diff --git a/content/renderer/media/render_audiosourceprovider.cc b/content/renderer/media/render_audiosourceprovider.cc
index da1e341ba2dea3f46f827b38b6e357280c340b36..d09b546855e7715606e78bd0205b1883426601fb 100644
--- a/content/renderer/media/render_audiosourceprovider.cc
+++ b/content/renderer/media/render_audiosourceprovider.cc
@@ -19,7 +19,8 @@ using content::AudioRendererMixerManager;
 using std::vector;
 using WebKit::WebVector;
 
-RenderAudioSourceProvider::RenderAudioSourceProvider()
+RenderAudioSourceProvider::RenderAudioSourceProvider(
+    content::RenderView* render_view)
     : is_initialized_(false),
       channels_(0),
       sample_rate_(0),
@@ -33,9 +34,9 @@ RenderAudioSourceProvider::RenderAudioSourceProvider()
   const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
   if (cmd_line->HasSwitch(switches::kEnableRendererSideMixing)) {
     default_sink_ = RenderThreadImpl::current()->
-        GetAudioRendererMixerManager()->CreateInput();
+        GetAudioRendererMixerManager()->CreateInput(render_view);
   } else {
-    default_sink_ = AudioDeviceFactory::Create();
+    default_sink_ = AudioDeviceFactory::Create(render_view);
   }
 }