VideoCaptureDeviceFactory: Change device enumeration to callback + QTKit enumerates in UI thread.

content/browser/renderer_host/media/media_stream_manager.cc

 // 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.
 
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 
 #include <list>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 1424 matching lines @@
   // We want to be notified of IO message loop destruction to delete the thread
   // and the device managers.
   io_loop_ = base::MessageLoop::current();
   io_loop_->AddDestructionObserver(this);
 
   if (CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kUseFakeDeviceForMediaStream)) {
     audio_input_device_manager()->UseFakeDevice();
   }
 
-  video_capture_manager_ = new VideoCaptureManager(
-      media::VideoCaptureDeviceFactory::CreateFactory());
+  video_capture_manager_ =
+      new VideoCaptureManager(media::VideoCaptureDeviceFactory::CreateFactory(
+          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI)));
   video_capture_manager_->Register(this, device_task_runner_);
 }
 
 void MediaStreamManager::Opened(MediaStreamType stream_type,
                                 int capture_session_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DVLOG(1) << "Opened({stream_type = " << stream_type <<  "} "
            << "{capture_session_id = " << capture_session_id << "})";
   // Find the request(s) containing this device and mark it as used.
   // It can be used in several requests since the same device can be
@@ skipping 470 matching lines @@
       if (it->device.type == MEDIA_DESKTOP_VIDEO_CAPTURE) {
         video_capture_manager_->SetDesktopCaptureWindowId(it->session_id,
                                                           window_id);
         break;
       }
     }
   }
 }
 
 }  // namespace content