Add a unified resource tracker shared between the proxy and the impl.

webkit/plugins/ppapi/ppb_audio_impl.h

Index: webkit/plugins/ppapi/ppb_audio_impl.h
diff --git a/webkit/plugins/ppapi/ppb_audio_impl.h b/webkit/plugins/ppapi/ppb_audio_impl.h
index 2a3ae8a0501d5e583725ffe49ce203b04e89f607..4570a87ba9de3ac02040376c0674edbada36a7b1 100644
--- a/webkit/plugins/ppapi/ppb_audio_impl.h
+++ b/webkit/plugins/ppapi/ppb_audio_impl.h
@@ -35,7 +35,7 @@ class PPB_AudioConfig_Impl : public Resource,
                             PP_AudioSampleRate sample_rate,
                             uint32_t sample_frame_count);
 
-  // ResourceObjectBase overrides.
+  // Resource overrides.
   virtual ::ppapi::thunk::PPB_AudioConfig_API* AsPPB_AudioConfig_API() OVERRIDE;
 
  private:
@@ -69,7 +69,7 @@ class PPB_Audio_Impl : public Resource,
   bool Init(PP_Resource config_id,
             PPB_Audio_Callback user_callback, void* user_data);
 
-  // ResourceObjectBase overrides.
+  // Resource overrides.
   virtual ::ppapi::thunk::PPB_Audio_API* AsPPB_Audio_API();
 
   // PPB_Audio_API implementation.