Update from https://crrev.com/333737

services/window_manager/capture_controller.h

 // Copyright 2014 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 SERVICES_WINDOW_MANAGER_CAPTURE_CONTROLLER_H_
 #define SERVICES_WINDOW_MANAGER_CAPTURE_CONTROLLER_H_
 
 #include "base/observer_list.h"
 #include "mojo/services/view_manager/public/cpp/view_observer.h"
 
@@ skipping 16 matching lines @@
 
  private:
   void NotifyCaptureChange(mojo::View* new_capture, mojo::View* old_capture);
 
   // Overridden from ViewObserver:
   void OnViewDestroying(mojo::View* view) override;
 
   // The current capture view. Null if there is no capture view.
   mojo::View* capture_view_;
 
-  ObserverList<CaptureControllerObserver> capture_controller_observers_;
+  base::ObserverList<CaptureControllerObserver> capture_controller_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(CaptureController);
 };
 
 void SetCaptureController(mojo::View* view,
                           CaptureController* capture_controller);
 CaptureController* GetCaptureController(mojo::View* view);
 mojo::View* GetCaptureView(mojo::View* view);
 
 }  // namespace window_manager
 
 #endif  // SERVICES_WINDOW_MANAGER_CAPTURE_CONTROLLER_H_