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

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

 // 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.
 
 #include "chrome/browser/ui/webui/media_router/media_router_dialog_controller_impl.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 293 matching lines @@
   DCHECK(media_router_dialog);
   if (!initiator() || !media_router_dialog->GetWebUI()) {
     Reset();
     return;
   }
 
   MediaRouterUI* media_router_ui = static_cast<MediaRouterUI*>(
       media_router_dialog->GetWebUI()->GetController());
   DCHECK(media_router_ui);
 
-  scoped_ptr<CreatePresentationConnectionRequest> create_connection_request(
-      TakeCreateConnectionRequest());
+  std::unique_ptr<CreatePresentationConnectionRequest>
+      create_connection_request(TakeCreateConnectionRequest());
   // TODO(imcheng): Don't create PresentationServiceDelegateImpl if it doesn't
   // exist (crbug.com/508695).
   base::WeakPtr<PresentationServiceDelegateImpl> delegate =
       PresentationServiceDelegateImpl::GetOrCreateForWebContents(initiator())
           ->GetWeakPtr();
   if (!create_connection_request.get()) {
     media_router_ui->InitWithDefaultMediaSource(delegate);
   } else {
     media_router_ui->InitWithPresentationSessionRequest(
         initiator(), delegate, std::move(create_connection_request));
   }
 }
 
 }  // namespace media_router