Adding key press detection in the browser process.

content/test/webrtc_audio_device_test.cc

Index: content/test/webrtc_audio_device_test.cc
diff --git a/content/test/webrtc_audio_device_test.cc b/content/test/webrtc_audio_device_test.cc
index c258caf7c16f439ed4ca9601e30e77afe7b98ef5..eb2f1c77754fcba7d1a9a4baa9bb5320180acd1f 100644
--- a/content/test/webrtc_audio_device_test.cc
+++ b/content/test/webrtc_audio_device_test.cc
@@ -252,9 +252,11 @@ void MAYBE_WebRTCAudioDeviceTest::CreateChannel(const char* name) {
       media_internals_.get(), media_stream_manager_.get());
   audio_render_host_->OnChannelConnected(base::GetCurrentProcId());
 
-  audio_input_renderer_host_ = new AudioInputRendererHost(
-      audio_manager_.get(), media_stream_manager_.get(),
-      mirroring_manager_.get());
+  audio_input_renderer_host_ =
+      new AudioInputRendererHost(audio_manager_.get(),
+                                 media_stream_manager_.get(),
+                                 mirroring_manager_.get(),
+                                 NULL);
   audio_input_renderer_host_->OnChannelConnected(base::GetCurrentProcId());
 
   channel_.reset(new IPC::Channel(name, IPC::Channel::MODE_SERVER, this));