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

chrome/browser/media/router/media_router_dialog_controller.cc

Index: chrome/browser/media/router/media_router_dialog_controller.cc
diff --git a/chrome/browser/media/router/media_router_dialog_controller.cc b/chrome/browser/media/router/media_router_dialog_controller.cc
index f363730fe0a0a6ff014f7df935a34480c0c242cf..8da6ddb93b1935988c8b6e6de2250ed6fd11f5b3 100644
--- a/chrome/browser/media/router/media_router_dialog_controller.cc
+++ b/chrome/browser/media/router/media_router_dialog_controller.cc
@@ -80,7 +80,7 @@ bool MediaRouterDialogController::ShowMediaRouterDialogForPresentation(
   if (IsShowingMediaRouterDialog())
     return false;
 
-  presentation_request_ = request.Pass();
+  create_session_request_ = request.Pass();
   CreateMediaRouterDialog();
 
   // Show the initiator holding the existing media router dialog.
@@ -116,12 +116,12 @@ void MediaRouterDialogController::ActivateInitiatorWebContents() {
 
 scoped_ptr<CreatePresentationSessionRequest>
 MediaRouterDialogController::TakePresentationRequest() {
-  return presentation_request_.Pass();
+  return create_session_request_.Pass();
 }
 
 void MediaRouterDialogController::Reset() {
   initiator_observer_.reset();
-  presentation_request_.reset();
+  create_session_request_.reset();
 }
 
 }  // namespace media_router