Plumb render view ID to media observer

content/renderer/media/render_audiosourceprovider.h

Index: content/renderer/media/render_audiosourceprovider.h
diff --git a/content/renderer/media/render_audiosourceprovider.h b/content/renderer/media/render_audiosourceprovider.h
index 41d73f1c511e1a971be62dbc1f70677b8755e8aa..af41b849df3c7fbec960a6aa0ca7a997ddf8f6e1 100644
--- a/content/renderer/media/render_audiosourceprovider.h
+++ b/content/renderer/media/render_audiosourceprovider.h
@@ -29,6 +29,10 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebAudioSourceProvider.h"
 
+namespace content {
+class RenderView;
+}
+
 namespace WebKit {
 class WebAudioSourceProviderClient;
 }
@@ -37,7 +41,7 @@ class RenderAudioSourceProvider
     : public WebKit::WebAudioSourceProvider,
       public media::AudioRendererSink {
  public:
-  RenderAudioSourceProvider();
+  RenderAudioSourceProvider(content::RenderView* render_view);
 
   // WebKit::WebAudioSourceProvider implementation.