[Presentation API / Media Router] Clean up default pres URL logic.

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 <vector>
 
 #include "chrome/browser/media/router/presentation_service_delegate_impl.h"
@@ skipping 256 matching lines @@
   }
 
   MediaRouterUI* media_router_ui = static_cast<MediaRouterUI*>(
       media_router_dialog->GetWebUI()->GetController());
   DCHECK(media_router_ui);
   if (!media_router_ui) {
     Reset();
     return;
   }
 
-  scoped_ptr<CreatePresentationSessionRequest> presentation_request(
-      TakePresentationRequest());
+  scoped_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 (!presentation_request.get()) {
+  if (!create_connection_request.get()) {
     media_router_ui->InitWithDefaultMediaSource(delegate);
   } else {
     media_router_ui->InitWithPresentationSessionRequest(
-        initiator(), delegate, presentation_request.Pass());
+        initiator(), delegate, create_connection_request.Pass());
   }
 }
 
 }  // namespace media_router