Adding an interface to allow extention of the audio player for CRD and iOS.

remoting/client/audio_player.h

Index: remoting/client/audio_player.h
diff --git a/remoting/client/audio_player.h b/remoting/client/audio_player.h
index ea0b789d75c5b20b7b5c7947446865a59d90178b..88fad4e37855212db5b2cac1bfcee6254c03fdf6 100644
--- a/remoting/client/audio_player.h
+++ b/remoting/client/audio_player.h
@@ -13,23 +13,23 @@
 
 #include "base/macros.h"
 #include "base/synchronization/lock.h"
+#include "remoting/client/audio_consumer.h"
 #include "remoting/proto/audio.pb.h"
 
 namespace remoting {
 
-class AudioPlayer {
+class AudioPlayer : public AudioConsumer {
  public:
   // The number of channels in the audio stream (only supporting stereo audio
   // for now).
   static const int kChannels = 2;
   static const int kSampleSizeBytes = 2;
 
-  virtual ~AudioPlayer();
-
   void ProcessAudioPacket(std::unique_ptr<AudioPacket> packet);
 
  protected:
   AudioPlayer();
+  ~AudioPlayer() override;
 
   // Return the recommended number of samples to include in a frame.
   virtual uint32_t GetSamplesPerFrame() = 0;
@@ -47,6 +47,8 @@ class AudioPlayer {
   // its buffer. Will fill the buffer with 0's if no sample is available.
   void FillWithSamples(void* samples, uint32_t buffer_size);
 
+  void AddAudioPacket(std::unique_ptr<AudioPacket> packet) override;
+
  private:
   friend class AudioPlayerTest;