Cleanup: Remove unneeded forward declarations from remoting.

remoting/protocol/rtcp_writer.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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 REMOTING_PROTOCOL_RTCP_WRITER_H_
 #define REMOTING_PROTOCOL_RTCP_WRITER_H_
 
 #include "net/socket/socket.h"
 
 namespace base {
 class MessageLoopProxy;
 }  // namespace base
 
 namespace remoting {
 
-class CompoundBuffer;
-
 namespace protocol {
 
 class BufferedDatagramWriter;
 struct RtcpReceiverReport;
 
 class RtcpWriter {
  public:
-  RtcpWriter(base::MessageLoopProxy* message_loop);
+  explicit RtcpWriter(base::MessageLoopProxy* message_loop);
   virtual ~RtcpWriter();
 
   // Initializes the writer. Must be called on the thread the socket
   // belongs to.
   void Init(net::Socket* socket);
   void Close();
 
   // Sends next packet. The packet is mutated by
   void SendReport(const RtcpReceiverReport& report);
 
   // Returns number of packets queued in the buffer.
   int GetPendingPackets();
 
  private:
   scoped_refptr<BufferedDatagramWriter> buffered_rtcp_writer_;
 
   DISALLOW_COPY_AND_ASSIGN(RtcpWriter);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_RTCP_WRITER_H_