[Media Router] Remove the extension ID getter from MRMojoImpl

chrome/browser/ui/toolbar/media_router_contextual_menu.cc

Index: chrome/browser/ui/toolbar/media_router_contextual_menu.cc
diff --git a/chrome/browser/ui/toolbar/media_router_contextual_menu.cc b/chrome/browser/ui/toolbar/media_router_contextual_menu.cc
index 684c733e063d844f76e56f6e981b96146a102f86..cfa1818ab6f0bb26563f79ed49b02f761e64a07b 100644
--- a/chrome/browser/ui/toolbar/media_router_contextual_menu.cc
+++ b/chrome/browser/ui/toolbar/media_router_contextual_menu.cc
@@ -9,6 +9,8 @@
 #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"
@@ -182,17 +184,15 @@ void MediaRouterContextualMenu::ExecuteCommand(int command_id,
 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));
 }