cast: Split Rtcp into two for sender and receiver

media/cast/net/rtcp/rtcp_session.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright (c) 2015 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_TEST_UTILITY_TEST_UTIL_H
-#define MEDIA_CAST_TEST_UTILITY_TEST_UTIL_H
-
-#include <stddef.h>
-
-#include <string>
-#include <vector>
+#ifndef MEDIA_CAST_NET_RTCP_RTCP_SESSION_H_
+#define MEDIA_CAST_NET_RTCP_RTCP_SESSION_H_
 
 namespace media {
 namespace cast {
-namespace test {
 
-class MeanAndError {
+// Base class for an RTCP session.
+class RtcpSession {
  public:
-  MeanAndError() {}
-  explicit MeanAndError(const std::vector<double>& values);
-  std::string AsString() const;
+  virtual ~RtcpSession() {}
 
-  size_t num_values;
-  double mean;
-  double std_dev;
+  // Handle incoming RTCP packet.
+  // Returns false if it is not a RTCP packet or it is not directed to
+  // this session, e.g. SSRC doesn't match.
+  virtual bool IncomingRtcpPacket(const uint8_t* data, size_t length) = 0;
 };
 
-}  // namespace test
 }  // namespace cast
 }  // namespace media
 
-#endif  // MEDIA_CAST_TEST_UTILITY_TEST_UTIL_H
+#endif  // MEDIA_CAST_NET_RTCP_RTCP_SESSION_H_