Add VideoPacket struct for video packets. Refactor Decode interface to use it.

remoting/protocol/video_writer.h

 // Copyright (c) 2010 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.
 
 // VideoWriter is a generic interface for a video stream writer. RtpVideoWriter
 // and ProtobufVideoWriter implement this interface for RTP and protobuf video
 // streams. VideoWriter is used by ConnectionToClient to write into the video
 // stream.
 
 #ifndef REMOTING_PROTOCOL_VIDEO_WRITER_H_
 #define REMOTING_PROTOCOL_VIDEO_WRITER_H_
 
 #include "base/basictypes.h"
-#include "remoting/proto/video.pb.h"
 
 namespace remoting {
 
-namespace protocol {
-class Session;
-}  // namespace protocol
-
 class ChromotocolConfig;
-class ChromotocolConnection;
+class VideoPacket;
 
 namespace protocol {
 
+class Session;
+
 // TODO(sergeyu): VideoWriter should implement VideoStub interface.
 class VideoWriter {
  public:
   virtual ~VideoWriter();
 
   static VideoWriter* Create(const ChromotocolConfig* config);
 
   // Initializes the writer.
   virtual void Init(protocol::Session* session) = 0;
 
   // Sends the |packet|.
   virtual void SendPacket(const VideoPacket& packet) = 0;
 
   // Returns number of packets currently pending in the buffer.
   virtual int GetPendingPackets() = 0;
 
   virtual void Close() = 0;
 
  protected:
   VideoWriter() { }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(VideoWriter);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_VIDEO_WRITER_H_