[Media Router] Return NotFoundError on dialog exit if appropriate

chrome/browser/ui/webui/media_router/media_router_ui.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_UI_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 137 matching lines @@
 
   // Called to track UI metrics.
   void SetUIInitializationTimer(const base::Time& start_time);
   void OnUIInitiallyLoaded();
   void OnUIInitialDataReceived();
 
   void UpdateMaxDialogHeight(int height);
 
   void InitForTest(MediaRouter* router,
                    content::WebContents* initiator,
-                   MediaRouterWebUIMessageHandler* handler);
+                   MediaRouterWebUIMessageHandler* handler,
+                   std::unique_ptr<CreatePresentationConnectionRequest>
+                       create_session_request);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(MediaRouterUITest, SortedSinks);
   FRIEND_TEST_ALL_PREFIXES(MediaRouterUITest,
                            UIMediaRoutesObserverFiltersNonDisplayRoutes);
   FRIEND_TEST_ALL_PREFIXES(MediaRouterUITest,
       UIMediaRoutesObserverFiltersNonDisplayJoinableRoutes);
   FRIEND_TEST_ALL_PREFIXES(MediaRouterUITest,
       UIMediaRoutesObserverAssignsCurrentCastModes);
   FRIEND_TEST_ALL_PREFIXES(MediaRouterUITest,
@@ skipping 161 matching lines @@
   // NOTE: Weak pointers must be invalidated before all other member variables.
   // Therefore |weak_factory_| must be placed at the end.
   base::WeakPtrFactory<MediaRouterUI> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterUI);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_UI_H_