[Media Router] Conditionally enable mDNS on Windows.

chrome/browser/media/router/media_router_mojo_test.h

Index: chrome/browser/media/router/media_router_mojo_test.h
diff --git a/chrome/browser/media/router/media_router_mojo_test.h b/chrome/browser/media/router/media_router_mojo_test.h
index de05a43b7c99d32d27449094330127c5d2e12f13..22a79544743ac5120c23e83c8794881f428a01f5 100644
--- a/chrome/browser/media/router/media_router_mojo_test.h
+++ b/chrome/browser/media/router/media_router_mojo_test.h
@@ -9,11 +9,12 @@
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "chrome/browser/media/router/media_router_mojo_impl.h"
 #include "chrome/browser/media/router/mock_media_router.h"
 #include "chrome/browser/media/router/test_helper.h"
 #include "chrome/test/base/testing_profile.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "extensions/common/extension.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ -50,10 +51,10 @@ class MediaRouterMojoTest : public ::testing::Test {
   media_router::interfaces::MediaRouterPtr media_router_proxy_;
 
  private:
+  content::TestBrowserThreadBundle test_thread_bundle_;
   scoped_refptr<extensions::Extension> extension_;
   scoped_ptr<MediaRouterMojoImpl> mock_media_router_;
   scoped_ptr<mojo::Binding<interfaces::MediaRouteProvider>> binding_;
-  base::MessageLoop message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterMojoTest);
 };