Remove MediaStreamDeviceThread in favor of audio worker TaskRunner.

content/browser/renderer_host/media/media_stream_provider.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.
 
 // MediaStreamProvider is used to capture media of the types defined in
 // MediaStreamType. There is only one MediaStreamProvider instance per media
 // type and a MediaStreamProvider instance can have only one registered
 // listener.
 // The MediaStreamManager is expected to be called on Browser::IO thread and
 // the listener will be called on the same thread.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_PROVIDER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_PROVIDER_H_
 
 #include <list>
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
 
 namespace base {
-class MessageLoopProxy;
+class SingleThreadTaskRunner;
 }
 
 namespace content {
 
 enum MediaStreamProviderError {
   kMediaStreamOk = 0,
   kInvalidMediaStreamType,
   kInvalidSession,
   kUnknownSession,
   kDeviceNotAvailable,
@@ skipping 14 matching lines @@
 
   // Called by a MediaStreamProvider when available devices has been enumerated.
   virtual void DevicesEnumerated(MediaStreamType stream_type,
                                  const StreamDeviceInfoArray& devices) = 0;
 
  protected:
   virtual ~MediaStreamProviderListener() {}
 };
 
 // Implemented by a manager class providing captured media.
 class CONTENT_EXPORT MediaStreamProvider

[DaleCurtis, 2014/02/04 19:10:42]

Note: It looks like this class only has one implementation, time to merge with
the impl?

[tommi (sloooow) - chröme, 2014/02/04 20:45:57]

Sgtm 

[DaleCurtis, 2014/02/04 20:56:06]

Actually I misread this early.  Both AudioInputDeviceManager and
VideoCaptureDeviceManager are MediaStreamProviders so there are two
implementations.  Disregard me!

     : public base::RefCountedThreadSafe<MediaStreamProvider> {
  public:
   // Registers a listener and a device message loop.
   virtual void Register(MediaStreamProviderListener* listener,
-                        base::MessageLoopProxy* device_thread_loop) = 0;
+                        const scoped_refptr<base::SingleThreadTaskRunner>&
+                            device_task_runner) = 0;
 
   // Unregisters the previously registered listener.
   virtual void Unregister() = 0;
 
   // Enumerates existing capture devices and calls |DevicesEnumerated|.
   virtual void EnumerateDevices(MediaStreamType stream_type) = 0;
 
   // Opens the specified device. The device is not started and it is still
   // possible for other applications to open the device before the device is
   // started. |Opened| is called when the device is opened.
   // kInvalidMediaCaptureSessionId is returned on error.
   virtual int Open(const StreamDeviceInfo& device) = 0;
 
   // Closes the specified device and calls |Closed| when done.
   virtual void Close(int capture_session_id) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<MediaStreamProvider>;
   virtual ~MediaStreamProvider() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_PROVIDER_H_