This patch tries to remove most of the manual registration for Pepper interfaces, and replaces it...

ppapi/proxy/ppp_video_decoder_proxy.h

Index: ppapi/proxy/ppp_video_decoder_proxy.h
===================================================================
--- ppapi/proxy/ppp_video_decoder_proxy.h	(revision 100758)
+++ ppapi/proxy/ppp_video_decoder_proxy.h	(working copy)
@@ -18,15 +18,11 @@
 
 class PPP_VideoDecoder_Proxy : public InterfaceProxy {
  public:
-  PPP_VideoDecoder_Proxy(Dispatcher* dispatcher, const void* target_interface);
+  PPP_VideoDecoder_Proxy(Dispatcher* dispatcher);
   virtual ~PPP_VideoDecoder_Proxy();
 
   static const Info* GetInfo();
 
-  const PPP_VideoDecoder_Dev* ppp_video_decoder_target() const {
-    return static_cast<const PPP_VideoDecoder_Dev*>(target_interface());
-  }
-
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
@@ -43,6 +39,11 @@
   void OnMsgNotifyError(const ppapi::HostResource& decoder,
                         PP_VideoDecodeError_Dev error);
 
+  // When this proxy is in the plugin side, this value caches the interface
+  // pointer so we don't have to retrieve it from the dispatcher each time.
+  // In the host, this value is always NULL.
+  const PPP_VideoDecoder_Dev* ppp_video_decoder_impl_;
+
   DISALLOW_COPY_AND_ASSIGN(PPP_VideoDecoder_Proxy);
 };