Retry: Win Video Capture: Create an STA |video_capture_thread_| from MediaStreamManager.

content/browser/renderer_host/media/video_capture_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.
 
 // VideoCaptureManager is used to open/close, start/stop, enumerate available
 // video capture devices, and manage VideoCaptureController's.
 // All functions are expected to be called from Browser::IO thread. Some helper
 // functions (*OnDeviceThread) will dispatch operations to the device thread.
 // VideoCaptureManager will open OS dependent instances of VideoCaptureDevice.
 // A device can only be opened once.
@@ skipping 113 matching lines @@
   // Sets the platform-dependent window ID for the desktop capture notification
   // UI for the given session.
   void SetDesktopCaptureWindowId(media::VideoCaptureSessionId session_id,
                                  gfx::NativeViewId window_id);
 
   // Gets a weak reference to the device factory, used for tests.
   media::VideoCaptureDeviceFactory* video_capture_device_factory() const {
     return video_capture_device_factory_.get();
   }
 
+#if defined(OS_WIN)
+  void set_device_task_runner(
+      const scoped_refptr<base::SingleThreadTaskRunner>& device_task_runner) {
+    device_task_runner_ = device_task_runner;
+  }
+#endif
+
  private:
   ~VideoCaptureManager() override;
   struct DeviceEntry;
 
   // Checks to see if |entry| has no clients left on its controller. If so,
   // remove it from the list of devices, and delete it asynchronously. |entry|
   // may be freed by this function.
   void DestroyDeviceEntryIfNoClients(DeviceEntry* entry);
 
   // Helpers to report an event to our Listener.
@@ skipping 112 matching lines @@
   // Accessed on the device thread only.
   std::map<media::VideoCaptureSessionId, gfx::NativeViewId>
       notification_window_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_