Implicit audio output device selection for getUserMedia.

content/test/webrtc_audio_device_test.h

Index: content/test/webrtc_audio_device_test.h
diff --git a/content/test/webrtc_audio_device_test.h b/content/test/webrtc_audio_device_test.h
index b2fefafdf246002b0d0e0f5974c5ce866982b7f2..927e1dcb40b4d64b30ab175f6ce7dca2f3be03c7 100644
--- a/content/test/webrtc_audio_device_test.h
+++ b/content/test/webrtc_audio_device_test.h
@@ -53,6 +53,7 @@ class MediaStreamManager;
 class RenderThreadImpl;
 class ResourceContext;
 class TestBrowserThread;
+class WebRtcAudioRenderer;
 class WebRTCMockRenderProcess;
 
 // Scoped class for WebRTC interfaces.  Fetches the wrapped interface
@@ -134,6 +135,9 @@ class MAYBE_WebRTCAudioDeviceTest : public ::testing::Test,
 
   void SetAudioHardwareConfig(media::AudioHardwareConfig* hardware_config);
 
+  scoped_refptr<WebRtcAudioRenderer> CreateDefaultWebRtcAudioRenderer(
+      int render_view_id);
+
  protected:
   void InitializeIOThread(const char* thread_name);
   void UninitializeIOThread();