Added automatic mode to FakeInputAudioStream to generate automatic beeps

content/browser/renderer_host/media/audio_input_device_manager.h

Index: content/browser/renderer_host/media/audio_input_device_manager.h
diff --git a/content/browser/renderer_host/media/audio_input_device_manager.h b/content/browser/renderer_host/media/audio_input_device_manager.h
index 231f30b3a3294b151065470a83d4135754f6347f..e8d44cb807ab2a188181bd9f4ca88641fa0b4b63 100644
--- a/content/browser/renderer_host/media/audio_input_device_manager.h
+++ b/content/browser/renderer_host/media/audio_input_device_manager.h
@@ -22,6 +22,7 @@
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
 #include "content/public/common/media_stream_request.h"
+#include "media/audio/audio_device_name.h"
 
 namespace media {
 class AudioManager;
@@ -56,6 +57,10 @@ class CONTENT_EXPORT AudioInputDeviceManager : public MediaStreamProvider {
   bool ShouldUseFakeDevice() const;
 
  private:
+  // Used by the unittests to get a list of fake devices.
+  friend class MediaStreamDispatcherHostTest;
+  void GetFakeDeviceNames(media::AudioDeviceNames* device_names);
+
   typedef std::vector<StreamDeviceInfo> StreamDeviceList;
   virtual ~AudioInputDeviceManager();