Plumb render view ID to media observer

content/renderer/renderer_webkitplatformsupport_impl.cc

Index: content/renderer/renderer_webkitplatformsupport_impl.cc
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.cc b/content/renderer/renderer_webkitplatformsupport_impl.cc
index 5d9b262dfbd4bd6bb8b2b58485900bedd6d0fa90..bc700ccdeb5b2d1cc35ffce6b8d72322e5c48eb3 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.cc
+++ b/content/renderer/renderer_webkitplatformsupport_impl.cc
@@ -597,6 +597,13 @@ RendererWebKitPlatformSupportImpl::createAudioDevice(
     unsigned numberOfChannels,
     double sampleRate,
     WebAudioDevice::RenderCallback* callback) {
+  WebFrame* web_frame = WebFrame::frameForCurrentContext();
+  if (!web_frame)
+    return NULL;
+  RenderViewImpl* render_view = RenderViewImpl::FromWebView(web_frame->view());
+  if (!render_view)
+    return NULL;
+
   ChannelLayout layout = CHANNEL_LAYOUT_UNSUPPORTED;
 
   // The |numberOfChannels| does not exactly identify the channel layout of the
@@ -637,7 +644,7 @@ RendererWebKitPlatformSupportImpl::createAudioDevice(
       media::AudioParameters::AUDIO_PCM_LOW_LATENCY, layout,
       static_cast<int>(sampleRate), 16, bufferSize);
 
-  return new RendererWebAudioDeviceImpl(params, callback);
+  return new RendererWebAudioDeviceImpl(render_view, params, callback);
 }
 
 //------------------------------------------------------------------------------