Rmoving the notion of task runner from MediaStreamProvider interface.

content/browser/renderer_host/media/video_capture_manager.h

Index: content/browser/renderer_host/media/video_capture_manager.h
diff --git a/content/browser/renderer_host/media/video_capture_manager.h b/content/browser/renderer_host/media/video_capture_manager.h
index 54c2d1cb71cc5db4ff070b0d233fa87f4d92b255..569910d09d1f9dc23b58ef29c11c1f3b9b559652 100644
--- a/content/browser/renderer_host/media/video_capture_manager.h
+++ b/content/browser/renderer_host/media/video_capture_manager.h
@@ -1,4 +1,4 @@
-  // Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -50,15 +50,13 @@ class CONTENT_EXPORT VideoCaptureManager : public MediaStreamProvider {
   using DoneCB =
       base::Callback<void(const base::WeakPtr<VideoCaptureController>&)>;
 
-  explicit VideoCaptureManager(
-      std::unique_ptr<media::VideoCaptureDeviceFactory> factory);
-
-  void Unregister();
+  VideoCaptureManager(
+      std::unique_ptr<media::VideoCaptureDeviceFactory> factory,
+      scoped_refptr<base::SingleThreadTaskRunner> device_task_runner);
 
   // Implements MediaStreamProvider.
-  void Register(MediaStreamProviderListener* listener,
-                const scoped_refptr<base::SingleThreadTaskRunner>&
-                    device_task_runner) override;
+  void RegisterListener(MediaStreamProviderListener* listener) override;
+  void UnregisterListener() override;
   int Open(const StreamDeviceInfo& device) override;
   void Close(int capture_session_id) override;