Add an interface for accepting keypress signals to AudioProcessing.

R=aluebs@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/8429004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5529 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_processing/include/mock_audio_processing.h

@@ -209,6 +209,10 @@ class MockAudioProcessing : public AudioProcessing {
       int(int delay));
   MOCK_CONST_METHOD0(stream_delay_ms,
       int());
+  MOCK_METHOD1(set_stream_key_pressed,
+      void(bool key_pressed));
+  MOCK_CONST_METHOD0(stream_key_pressed,
+      bool());
   MOCK_METHOD1(set_delay_offset_ms,
       void(int offset));
   MOCK_CONST_METHOD0(delay_offset_ms,