PPAPI: Make blocking completion callbacks work.

ppapi/thunk/ppb_video_decoder_thunk.cc

Index: ppapi/thunk/ppb_video_decoder_thunk.cc
diff --git a/ppapi/thunk/ppb_video_decoder_thunk.cc b/ppapi/thunk/ppb_video_decoder_thunk.cc
index 3895c71d907332dc7b01303363aba655a7b0a156..65a1c804c5e7b7c268997f42e3e05d193d44db61 100644
--- a/ppapi/thunk/ppb_video_decoder_thunk.cc
+++ b/ppapi/thunk/ppb_video_decoder_thunk.cc
@@ -35,7 +35,8 @@ int32_t Decode(PP_Resource video_decoder,
   EnterVideoDecoder enter(video_decoder, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Decode(bitstream_buffer, callback));
+  return enter.SetResult(enter.object()->Decode(bitstream_buffer,
+                                                enter.callback()));
 }
 
 void AssignPictureBuffers(PP_Resource video_decoder,
@@ -56,7 +57,7 @@ int32_t Flush(PP_Resource video_decoder, PP_CompletionCallback callback) {
   EnterVideoDecoder enter(video_decoder, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Flush(callback));
+  return enter.SetResult(enter.object()->Flush(enter.callback()));
 }
 
 int32_t Reset(PP_Resource video_decoder,
@@ -64,7 +65,7 @@ int32_t Reset(PP_Resource video_decoder,
   EnterVideoDecoder enter(video_decoder, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Reset(callback));
+  return enter.SetResult(enter.object()->Reset(enter.callback()));
 }
 
 void Destroy(PP_Resource video_decoder) {