[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 9efe8b98f0c2fb49839eb762bfc925d6a82833c0..ff7d24d8baf037d5e2be63d05c36861758f0c059 100644
--- a/chrome/browser/media/router/media_router_dialog_controller.cc
+++ b/chrome/browser/media/router/media_router_dialog_controller.cc
@@ -79,7 +79,7 @@ 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.
@@ -112,12 +112,12 @@ 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