Add a method to inform AudioProcessing that its output will be muted.

R=turaj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/8559004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5538 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_processing/include/mock_audio_processing.h

@@ -201,6 +201,10 @@ class MockAudioProcessing : public AudioProcessing {
       int(int channels));
   MOCK_CONST_METHOD0(num_reverse_channels,
       int());
+  MOCK_METHOD1(set_output_will_be_muted,
+      void(bool muted));
+  MOCK_CONST_METHOD0(output_will_be_muted,
+      bool());
   MOCK_METHOD1(ProcessStream,
       int(AudioFrame* frame));
   MOCK_METHOD1(AnalyzeReverseStream,