PPAPI: Make blocking completion callbacks work.

webkit/plugins/ppapi/ppb_video_decoder_impl.h

Index: webkit/plugins/ppapi/ppb_video_decoder_impl.h
diff --git a/webkit/plugins/ppapi/ppb_video_decoder_impl.h b/webkit/plugins/ppapi/ppb_video_decoder_impl.h
index 990e98092afb257282a46d0956faa933c07e12df..f7cde14792aab1a81495b3ae62da72e8cb31e95f 100644
--- a/webkit/plugins/ppapi/ppb_video_decoder_impl.h
+++ b/webkit/plugins/ppapi/ppb_video_decoder_impl.h
@@ -41,13 +41,16 @@ class PPB_VideoDecoder_Impl : public ::ppapi::PPB_VideoDecoder_Shared,
                             PP_VideoDecoder_Profile profile);
 
   // PPB_VideoDecoder_API implementation.
-  virtual int32_t Decode(const PP_VideoBitstreamBuffer_Dev* bitstream_buffer,
-                         PP_CompletionCallback callback) OVERRIDE;
+  virtual int32_t Decode(
+      const PP_VideoBitstreamBuffer_Dev* bitstream_buffer,
+      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
   virtual void AssignPictureBuffers(
       uint32_t no_of_buffers, const PP_PictureBuffer_Dev* buffers) OVERRIDE;
   virtual void ReusePictureBuffer(int32_t picture_buffer_id) OVERRIDE;
-  virtual int32_t Flush(PP_CompletionCallback callback) OVERRIDE;
-  virtual int32_t Reset(PP_CompletionCallback callback) OVERRIDE;
+  virtual int32_t Flush(
+      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
+  virtual int32_t Reset(
+      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
   virtual void Destroy() OVERRIDE;
 
   // media::VideoDecodeAccelerator::Client implementation.