Added automatic mode to FakeInputAudioStream to generate automatic beeps

content/browser/renderer_host/media/audio_input_device_manager.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // AudioInputDeviceManager manages the audio input devices. In particular it
 // communicates with MediaStreamManager and AudioInputRendererHost on the
 // browser IO thread, handles queries like
 // enumerate/open/close/GetOpenedDeviceInfoById from MediaStreamManager and
 // GetOpenedDeviceInfoById from AudioInputRendererHost.
 // The work for enumerate/open/close is handled asynchronously on Media Stream
 // device thread, while GetOpenedDeviceInfoById is synchronous on the IO thread.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
 #include "content/browser/renderer_host/media/media_stream_provider.h"
 #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;
 }
 
 namespace content {
 
 class CONTENT_EXPORT AudioInputDeviceManager : public MediaStreamProvider {
  public:
   // Calling Start() with this kFakeOpenSessionId will open the default device,
@@ skipping 14 matching lines @@
                             device_task_runner) OVERRIDE;
   virtual void Unregister() OVERRIDE;
   virtual void EnumerateDevices(MediaStreamType stream_type) OVERRIDE;
   virtual int Open(const StreamDeviceInfo& device) OVERRIDE;
   virtual void Close(int session_id) OVERRIDE;
 
   void UseFakeDevice();
   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();
 
   // Enumerates audio input devices on media stream device thread.
   void EnumerateOnDeviceThread(MediaStreamType stream_type);
   // Opens the device on media stream device thread.
   void OpenOnDeviceThread(int session_id, const StreamDeviceInfo& info);
 
   // Callback used by EnumerateOnDeviceThread(), called with a list of
   // enumerated devices on IO thread.
@@ skipping 23 matching lines @@
 
   // The message loop of media stream device thread that this object runs on.
   scoped_refptr<base::SingleThreadTaskRunner> device_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioInputDeviceManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_