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

remoting/client/fake_audio_consumer.cc

Index: remoting/client/fake_audio_consumer.cc
diff --git a/remoting/client/fake_audio_consumer.cc b/remoting/client/fake_audio_consumer.cc
index a19df2c6d7dc1e5cf8147cfdecbef372cf3b8bd0..9b849edb37f2b5acfa72ee14b0d835c34aa519cc 100644
--- a/remoting/client/fake_audio_consumer.cc
+++ b/remoting/client/fake_audio_consumer.cc
@@ -3,15 +3,19 @@
 // found in the LICENSE file.
 
 #include "remoting/client/fake_audio_consumer.h"
+
 #include "remoting/proto/audio.pb.h"
 
 namespace remoting {
 
-FakeAudioConsumer::FakeAudioConsumer() : weak_factory_(this) {}
+FakeAudioConsumer::FakeAudioConsumer()
+    : AddAudioPacket_count(0), weak_factory_(this) {}
 
 FakeAudioConsumer::~FakeAudioConsumer() {}
 
-void FakeAudioConsumer::AddAudioPacket(std::unique_ptr<AudioPacket> packet) {}
+void FakeAudioConsumer::AddAudioPacket(std::unique_ptr<AudioPacket> packet) {
+  AddAudioPacket_count++;
+}
 
 base::WeakPtr<FakeAudioConsumer> FakeAudioConsumer::GetWeakPtr() {
   return weak_factory_.GetWeakPtr();