Change WebURLLoaderMockFactory for future FOUC tests in blink.

content/test/weburl_loader_mock_factory.h

 // Copyright 2013 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.
 
 #ifndef CONTENT_TEST_WEBURL_LOADER_MOCK_FACTORY_H_
 #define CONTENT_TEST_WEBURL_LOADER_MOCK_FACTORY_H_
 
 #include <map>
 
 #include "base/files/file_path.h"
@@ skipping 20 matching lines @@
  public:
   WebURLLoaderMockFactory();
   virtual ~WebURLLoaderMockFactory();
 
   // Called by TestBlinkWebUnitTestSupport to create a WebURLLoader.
   // Non-mocked request are forwarded to |default_loader| which should not be
   // NULL.
   virtual blink::WebURLLoader* CreateURLLoader(
       blink::WebURLLoader* default_loader);
 
-  // Registers a response and the contents to be served when the specified URL
-  // is loaded.
+  // Registers a response and the file to be served when the specified URL
+  // is loaded. If no file is specified then the response content will be empty.
   void RegisterURL(const blink::WebURL& url,
                    const blink::WebURLResponse& response,
-                   const blink::WebString& filePath);
+                   const blink::WebString& filePath = blink::WebString());
 
   // Registers an error to be served when the specified URL is requested.
   void RegisterErrorURL(const blink::WebURL& url,
                         const blink::WebURLResponse& response,
                         const blink::WebURLError& error);
 
   // Unregisters |url| so it will no longer be mocked.
   void UnregisterURL(const blink::WebURL& url);
 
   // Unregister all URLs so no URL will be mocked anymore.
@@ skipping 55 matching lines @@
 
   // Table of the registered URLs and the responses that they should receive.
   typedef std::map<GURL, ResponseInfo> URLToResponseMap;
   URLToResponseMap url_to_reponse_info_;
 
   DISALLOW_COPY_AND_ASSIGN(WebURLLoaderMockFactory);
 };
 
 #endif  // CONTENT_TEST_WEBURL_LOADER_MOCK_FACTORY_H_