[Media Router] Check MediaRouterDialogControllerImpl only sets toolbar MediaRouterAction.

chrome/browser/ui/toolbar/mock_component_toolbar_actions_factory.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/toolbar/mock_component_toolbar_actions_factory.h"
 
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/toolbar/test_toolbar_action_view_controller.h"
 #include "chrome/browser/ui/toolbar/toolbar_action_view_controller.h"
 
@@ skipping 13 matching lines @@
 std::set<std::string>
 MockComponentToolbarActionsFactory::GetInitialComponentIds(Profile* profile) {
   std::set<std::string> ids;
   ids.insert(kActionIdForTesting);
   return ids;
 }
 
 scoped_ptr<ToolbarActionViewController>
 MockComponentToolbarActionsFactory::GetComponentToolbarActionForId(
     const std::string& id,
-    Browser* browser) {
+    Browser* browser,
+    ToolbarActionsBar* bar) {
   DCHECK_EQ(kActionIdForTesting, id);
   return scoped_ptr<ToolbarActionViewController>(
       new TestToolbarActionViewController(
           MockComponentToolbarActionsFactory::kActionIdForTesting));
 }