Add initialization callback support for Video Decoder PPAPI.

media/video/video_decode_accelerator.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_VIDEO_VIDEO_DECODE_ACCELERATOR_H_
 #define MEDIA_VIDEO_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 168 matching lines @@
 
   // Interface for collaborating with picture interface to provide memory for
   // output picture and blitting them.
   // This interface is extended by the various layers that relay messages back
   // to the plugin, through the PPP_VideoDecode_Dev interface the plugin
   // implements.
   class Client {
    public:
     virtual ~Client() {}
 
+    // Callback to notify client that decoder has been initialized.
+    virtual void NotifyInitializeDone() = 0;
+
     // Callback to tell the information needed by the client to provide decoding
     // buffer to the decoder.
     virtual void ProvidePictureBuffers(
         uint32 requested_num_of_buffers,
         const gfx::Size& dimensions,
         MemoryType type) = 0;
 
     // Callback to dismiss picture buffer that was assigned earlier.
     virtual void DismissPictureBuffer(int32 picture_buffer_id) = 0;
 
@@ skipping 81 matching lines @@
   // been finished. After abort all buffers can be considered dismissed, even
   // when there has not been callbacks to dismiss them.
   //
   // Returns true when command successfully accepted. Otherwise false.
   virtual bool Abort() = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_VIDEO_DECODE_ACCELERATOR_H_