[Media Router] Remove the extension ID getter from MRMojoImpl

chrome/browser/ui/toolbar/media_router_contextual_menu.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/media_router_contextual_menu.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "base/metrics/user_metrics.h"
 #include "chrome/app/chrome_command_ids.h"
+#include "chrome/browser/media/router/event_page_request_manager.h"
+#include "chrome/browser/media/router/event_page_request_manager_factory.h"
 #include "chrome/browser/media/router/media_router_factory.h"
 #include "chrome/browser/media/router/mojo/media_router_mojo_impl.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/singleton_tabs.h"
 #include "chrome/browser/ui/toolbar/component_toolbar_actions_factory.h"
 #include "chrome/browser/ui/toolbar/media_router_action_controller.h"
 #include "chrome/browser/ui/toolbar/toolbar_actions_model.h"
 #include "chrome/common/pref_names.h"
@@ skipping 153 matching lines @@
               !is_action_in_toolbar_);
       break;
     default:
       NOTREACHED();
   }
 }
 
 void MediaRouterContextualMenu::ReportIssue() {
   // Opens feedback page loaded from the media router extension.
   // This is temporary until feedback UI is redesigned.
-  // TODO(crbug.com/597778): remove reference to MediaRouterMojoImpl
-  media_router::MediaRouterMojoImpl* media_router =
-      static_cast<media_router::MediaRouterMojoImpl*>(
-          media_router::MediaRouterFactory::GetApiForBrowserContext(
-              static_cast<content::BrowserContext*>(browser_->profile())));
-  if (media_router->media_route_provider_extension_id().empty())
+  media_router::EventPageRequestManager* request_manager =
+      media_router::EventPageRequestManagerFactory::GetApiForBrowserContext(
+          browser_->profile());
+  if (request_manager->media_route_provider_extension_id().empty())
     return;
-  std::string feedback_url(extensions::kExtensionScheme +
-                           std::string(url::kStandardSchemeSeparator) +
-                           media_router->media_route_provider_extension_id() +
-                           "/feedback.html");
+  std::string feedback_url(
+      extensions::kExtensionScheme +
+      std::string(url::kStandardSchemeSeparator) +
+      request_manager->media_route_provider_extension_id() + "/feedback.html");
   chrome::ShowSingletonTab(browser_, GURL(feedback_url));
 }
 
 int MediaRouterContextualMenu::GetChangeVisibilityTextId() {
   return is_action_in_toolbar_ ? IDS_EXTENSIONS_HIDE_BUTTON_IN_MENU
                                : IDS_EXTENSIONS_SHOW_BUTTON_IN_TOOLBAR;
 }