Adding key press detection in the browser process.

content/renderer/media/webrtc_audio_device_impl.h

Index: content/renderer/media/webrtc_audio_device_impl.h
diff --git a/content/renderer/media/webrtc_audio_device_impl.h b/content/renderer/media/webrtc_audio_device_impl.h
index ef3cb7c4031b4dec51b55ff87583cc4148880816..b644178030b5009677935ad1a45bbf80033479b4 100644
--- a/content/renderer/media/webrtc_audio_device_impl.h
+++ b/content/renderer/media/webrtc_audio_device_impl.h
@@ -223,7 +223,8 @@ class WebRtcAudioCapturerSink {
                           int number_of_frames,
                           int audio_delay_milliseconds,
                           int current_volume,
-                          bool need_audio_processing) = 0;
+                          bool need_audio_processing,
+                          bool key_pressed) = 0;
 
   // Set the format for the capture audio parameters.
   virtual void SetCaptureFormat(const media::AudioParameters& params) = 0;
@@ -339,7 +340,8 @@ class CONTENT_EXPORT WebRtcAudioDeviceImpl
                           int number_of_frames,
                           int audio_delay_milliseconds,
                           int current_volume,
-                          bool need_audio_processing) OVERRIDE;
+                          bool need_audio_processing,
+                          bool key_pressed) OVERRIDE;
 
   // Called on the main render thread.
   virtual void SetCaptureFormat(const media::AudioParameters& params) OVERRIDE;