Reland 15721002: Hook up the device selection to the WebAudio live audio

content/renderer/media/renderer_webaudiodevice_impl.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.
 
 #ifndef CONTENT_RENDERER_MEDIA_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_checker.h"
 #include "media/audio/audio_parameters.h"
 #include "media/base/audio_renderer_sink.h"
 #include "third_party/WebKit/public/platform/WebAudioDevice.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 
 namespace media {
 class AudioOutputDevice;
 }
 
 namespace content {
 
 class RendererWebAudioDeviceImpl
     : public WebKit::WebAudioDevice,
       public media::AudioRendererSink::RenderCallback {
  public:
   RendererWebAudioDeviceImpl(const media::AudioParameters& params,
-                             WebKit::WebAudioDevice::RenderCallback* callback);
+                             WebKit::WebAudioDevice::RenderCallback* callback,
+                             int session_id);
   virtual ~RendererWebAudioDeviceImpl();
 
   // WebKit::WebAudioDevice implementation.
   virtual void start();
   virtual void stop();
   virtual double sampleRate();
 
   // AudioRendererSink::RenderCallback implementation.
   virtual int Render(media::AudioBus* dest,
                      int audio_delay_milliseconds) OVERRIDE;
@@ skipping 10 matching lines @@
   // Weak reference to the callback into WebKit code.
   WebKit::WebAudioDevice::RenderCallback* const client_callback_;
 
   // To avoid the need for locking, ensure the control methods of the
   // WebKit::WebAudioDevice implementation are called on the same thread.
   base::ThreadChecker thread_checker_;
 
   // When non-NULL, we are started.  When NULL, we are stopped.
   scoped_refptr<media::AudioOutputDevice> output_device_;
 
+  // ID to allow browser to select the correct input device for unified IO.
+  int session_id_;
+
   DISALLOW_COPY_AND_ASSIGN(RendererWebAudioDeviceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_