[Media Router] Factor extension-related logic out of MediaRouterMojoImpl

chrome/browser/media/router/mojo/media_router_mojo_test.cc

Index: chrome/browser/media/router/mojo/media_router_mojo_test.cc
diff --git a/chrome/browser/media/router/mojo/media_router_mojo_test.cc b/chrome/browser/media/router/mojo/media_router_mojo_test.cc
index be41039e1ce25584cfa2481c4d4a20c9f854d550..357e7ed4aa95cc629f5c6fab787332f9d672c047 100644
--- a/chrome/browser/media/router/mojo/media_router_mojo_test.cc
+++ b/chrome/browser/media/router/mojo/media_router_mojo_test.cc
@@ -60,13 +60,7 @@ MockMediaRouteControllerObserver::MockMediaRouteControllerObserver(
 
 MockMediaRouteControllerObserver::~MockMediaRouteControllerObserver() {}
 
-MediaRouterMojoTest::MediaRouterMojoTest()
-    : mock_media_router_(
-          new MediaRouterMojoImpl(&mock_event_page_tracker_, &profile_)) {
-  mock_media_router_->Initialize();
-  mock_media_router_->set_instance_id_for_test(kInstanceId);
-  extension_ = extensions::test_util::CreateEmptyExtension();
-}
+MediaRouterMojoTest::MediaRouterMojoTest() {}
 
 MediaRouterMojoTest::~MediaRouterMojoTest() {}
 
@@ -78,8 +72,8 @@ void MediaRouterMojoTest::ConnectProviderManagerService() {
   // Bind the Mojo MediaRouter interface used by |mock_media_router_| to
   // |mock_media_route_provider_service_|.
   mojom::MediaRouteProviderPtr mojo_media_router;
-  binding_.reset(new mojo::Binding<mojom::MediaRouteProvider>(
-      &mock_media_route_provider_, mojo::MakeRequest(&mojo_media_router)));
+  binding_ = base::MakeUnique<mojo::Binding<mojom::MediaRouteProvider>>(
+      &mock_media_route_provider_, mojo::MakeRequest(&mojo_media_router));
   EXPECT_CALL(provide_handler_, InvokeInternal(kInstanceId, testing::_));
   media_router_proxy_->RegisterMediaRouteProvider(
       std::move(mojo_media_router),
@@ -88,8 +82,10 @@ void MediaRouterMojoTest::ConnectProviderManagerService() {
 }
 
 void MediaRouterMojoTest::SetUp() {
-  ON_CALL(mock_event_page_tracker_, IsEventPageSuspended(extension_id()))
-      .WillByDefault(testing::Return(false));
+  mock_media_router_.reset(new MediaRouterMojoImpl(&profile_));
+  mock_media_router_->Initialize();
+  mock_media_router_->set_instance_id_for_test(kInstanceId);
+  extension_ = extensions::test_util::CreateEmptyExtension();
   ConnectProviderManagerService();
   base::RunLoop().RunUntilIdle();
 }