Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/webui/media_router/media_router_dialog_controller_impl.h

 // Copyright 2015 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 CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_DIALOG_CONTROLLER_IMPL_H_
 #define CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_DIALOG_CONTROLLER_IMPL_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 42 matching lines @@
   // MediaRouterDialogController:
   void CreateMediaRouterDialog() override;
   void CloseMediaRouterDialog() override;
   void Reset() override;
 
   // Invoked when the dialog WebContents has navigated.
   void OnDialogNavigated(const content::LoadCommittedDetails& details);
 
   void PopulateDialog(content::WebContents* media_router_dialog);
 
-  scoped_ptr<DialogWebContentsObserver> dialog_observer_;
+  std::unique_ptr<DialogWebContentsObserver> dialog_observer_;
 
   // True if the controller is waiting for a new media router dialog to be
   // created.
   bool media_router_dialog_pending_;
 
   // |action_| refers to the MediaRouterAction on the toolbar, rather than
   // overflow menu. A MediaRouterAction is always created for the toolbar
   // first. Any subsequent creations for the overflow menu will not be set as
   // |action_|.
   // The lifetime of |action_| is dependent on the creation and destruction of
   // a browser window. The overflow menu's MediaRouterAction is only created
   // when the overflow menu is opened and destroyed when the menu is closed.
   base::WeakPtr<MediaRouterAction> action_;
 
   base::WeakPtrFactory<MediaRouterDialogControllerImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterDialogControllerImpl);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_DIALOG_CONTROLLER_IMPL_H_