Be able to build cast_unittest and related targets in Chrome tree

media/cast/cast_config.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_CAST_CONFIG_H_
 #define MEDIA_CAST_CAST_CONFIG_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 169 matching lines @@
   virtual ~PacketSender() {}
 };
 
 class PacketReceiver : public base::RefCountedThreadSafe<PacketReceiver> {
  public:
   // All packets received from the network should be delivered via this
   // function.
   virtual void ReceivedPacket(const uint8* packet, int length,
                               const base::Closure callback) = 0;
 
+ protected:
   virtual ~PacketReceiver() {}
+
+ private:
+  friend class base::RefCountedThreadSafe<PacketReceiver>;
 };
 
 class VideoEncoderController {
  public:
   // Inform the encoder about the new target bit rate.
   virtual void SetBitRate(int new_bit_rate) = 0;
 
   // Inform the encoder to not encode the next frame.
   // Note: this setting is sticky and should last until called with false.
   virtual void SkipNextFrame(bool skip_next_frame) = 0;
 
   // Inform the encoder to encode the next frame as a key frame.
   virtual void GenerateKeyFrame() = 0;
 
   // Inform the encoder to only reference frames older or equal to frame_id;
   virtual void LatestFrameIdToReference(uint8 frame_id) = 0;
 
   // Query the codec about how many frames it has skipped due to slow ACK.
   virtual int NumberOfSkippedFrames() const = 0;
 
  protected:
   virtual ~VideoEncoderController() {}
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_CAST_CONFIG_H_