Convert ppapi/shared to use TrackedCallback.

webkit/plugins/ppapi/ppb_video_decoder_impl.cc

Index: webkit/plugins/ppapi/ppb_video_decoder_impl.cc
diff --git a/webkit/plugins/ppapi/ppb_video_decoder_impl.cc b/webkit/plugins/ppapi/ppb_video_decoder_impl.cc
index a226a77981e37d213e16846a2d20471402521a12..c83152ca0743b1aef4a6836fe54e25b4af71c48f 100644
--- a/webkit/plugins/ppapi/ppb_video_decoder_impl.cc
+++ b/webkit/plugins/ppapi/ppb_video_decoder_impl.cc
@@ -33,7 +33,7 @@ namespace webkit {
 namespace ppapi {
 
 PPB_VideoDecoder_Impl::PPB_VideoDecoder_Impl(PP_Instance instance)
-    : Resource(instance),
+    : PPB_VideoDecoder_Shared(instance),
       ppp_videodecoder_(NULL) {
   PluginModule* plugin_module = ResourceHelper::GetPluginModule(this);
   if (plugin_module) {
@@ -45,10 +45,6 @@ PPB_VideoDecoder_Impl::PPB_VideoDecoder_Impl(PP_Instance instance)
 PPB_VideoDecoder_Impl::~PPB_VideoDecoder_Impl() {
 }
 
-PPB_VideoDecoder_API* PPB_VideoDecoder_Impl::AsPPB_VideoDecoder_API() {
-  return this;
-}
-
 // Convert PP_VideoDecoder_Profile to media::VideoDecodeAccelerator::Profile.
 static media::VideoDecodeAccelerator::Profile PPToMediaProfile(
     const PP_VideoDecoder_Profile pp_profile) {