Cast: Refactor RTCP handling

media/cast/net/rtcp/mock_rtcp_sender_feedback.h

-// Copyright 2013 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_CAST_RTCP_MOCK_RTCP_SENDER_FEEDBACK_H_
-#define MEDIA_CAST_RTCP_MOCK_RTCP_SENDER_FEEDBACK_H_
-
-#include <vector>
-
-#include "media/cast/net/rtcp/rtcp_receiver.h"
-#include "testing/gmock/include/gmock/gmock.h"
-
-namespace media {
-namespace cast {
-
-class MockRtcpSenderFeedback : public RtcpSenderFeedback {
- public:
-  MockRtcpSenderFeedback();
-  virtual ~MockRtcpSenderFeedback();
-
-  MOCK_METHOD1(OnReceivedCastFeedback,
-               void(const RtcpCastMessage& cast_feedback));
-};
-
-}  // namespace cast
-}  // namespace media
-
-#endif  // MEDIA_CAST_RTCP_MOCK_RTCP_SENDER_FEEDBACK_H_