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

remoting/client/plugin/pepper_audio_player.cc

Index: remoting/client/plugin/pepper_audio_player.cc
diff --git a/remoting/client/plugin/pepper_audio_player.cc b/remoting/client/plugin/pepper_audio_player.cc
index 90e83b549751632972333b38aeb299a983520e50..e8d6b66460a0ff3e13bb026ec4732862a05689b1 100644
--- a/remoting/client/plugin/pepper_audio_player.cc
+++ b/remoting/client/plugin/pepper_audio_player.cc
@@ -15,9 +15,7 @@ const int kFrameSizeMs = 40;
 namespace remoting {
 
 PepperAudioPlayer::PepperAudioPlayer(pp::Instance* instance)
-    : instance_(instance),
-      samples_per_frame_(0) {
-}
+    : instance_(instance), samples_per_frame_(0), weak_factory_(this) {}
 
 PepperAudioPlayer::~PepperAudioPlayer() {
 }
@@ -26,6 +24,10 @@ uint32_t PepperAudioPlayer::GetSamplesPerFrame() {
   return samples_per_frame_;
 }
 
+base::WeakPtr<PepperAudioPlayer> PepperAudioPlayer::GetWeakPtr() {
+  return weak_factory_.GetWeakPtr();
+}
+
 bool PepperAudioPlayer::ResetAudioPlayer(
       AudioPacket::SamplingRate sampling_rate) {
   PP_AudioSampleRate pp_sampling_rate = PP_AUDIOSAMPLERATE_NONE;