ResourceFetcherTest: introduce FetchTestingPlatformSupport

third_party/WebKit/Source/platform/testing/weburl_loader_mock_factory_impl.cc

Index: third_party/WebKit/Source/platform/testing/weburl_loader_mock_factory_impl.cc
diff --git a/third_party/WebKit/Source/platform/testing/weburl_loader_mock_factory_impl.cc b/third_party/WebKit/Source/platform/testing/weburl_loader_mock_factory_impl.cc
index af7f93829b9eb2489e5b411f6eb8ea4f522d90fc..c9a6e1308744ef2b938e228a4588207337e5daf5 100644
--- a/third_party/WebKit/Source/platform/testing/weburl_loader_mock_factory_impl.cc
+++ b/third_party/WebKit/Source/platform/testing/weburl_loader_mock_factory_impl.cc
@@ -91,7 +91,7 @@ void WebURLLoaderMockFactoryImpl::serveAsynchronousRequests() {
     while (response.httpStatusCode() >= 300 &&
            response.httpStatusCode() < 400) {
       WebURLRequest newRequest = loader->ServeRedirect(request, response);
-      base::RunLoop().RunUntilIdle();
+      RunUntilIdle();
       if (!loader || loader->is_cancelled() || loader->is_deferred())
         break;
       LoadRequest(newRequest, &response, &error, &data);
@@ -99,10 +99,10 @@ void WebURLLoaderMockFactoryImpl::serveAsynchronousRequests() {
     // Serve the request if the loader is still active.
     if (loader && !loader->is_cancelled() && !loader->is_deferred()) {
       loader->ServeAsynchronousRequest(delegate_, response, data, error);
-      base::RunLoop().RunUntilIdle();
+      RunUntilIdle();
     }
   }
-  base::RunLoop().RunUntilIdle();
+  RunUntilIdle();
 }
 
 bool WebURLLoaderMockFactoryImpl::IsMockedURL(const blink::WebURL& url) {
@@ -130,6 +130,10 @@ void WebURLLoaderMockFactoryImpl::LoadAsynchronouly(
   pending_loaders_.set(loader, request);
 }
 
+void WebURLLoaderMockFactoryImpl::RunUntilIdle() {
+  base::RunLoop().RunUntilIdle();
+}
+
 void WebURLLoaderMockFactoryImpl::LoadRequest(const WebURLRequest& request,
                                               WebURLResponse* response,
                                               WebURLError* error,