Add error description to the DidFailProvisionalLoad callback.

content/renderer/mock_content_renderer_client.cc

 // Copyright (c) 2011 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.
 
 #include "content/renderer/mock_content_renderer_client.h"
 
 #include <string>
 #include "v8/include/v8.h"
 
 namespace content {
@@ skipping 24 matching lines @@
     const WebKit::WebPluginParams& params,
     WebKit::WebPlugin** plugin) {
   return false;
 }
 
 bool MockContentRendererClient::HasErrorPage(int http_status_code,
                                              std::string* error_domain) {
   return false;
 }
 
-std::string MockContentRendererClient::GetNavigationErrorHtml(
+void MockContentRendererClient::GetNavigationErrorStrings(
     const WebKit::WebURLRequest& failed_request,
-    const WebKit::WebURLError& error) {
-  return std::string();
+    const WebKit::WebURLError& error,
+    std::string* error_html,
+    string16* error_description) {
 }
 
 bool MockContentRendererClient::RunIdleHandlerWhenWidgetsHidden() {
   return true;
 }
 
 bool MockContentRendererClient::AllowPopup(const GURL& creator) {
   return false;
 }
 
@@ skipping 56 matching lines @@
     const GURL& first_party_for_cookies,
     const std::string& value) {
   return false;
 }
 
 bool MockContentRendererClient::IsProtocolSupportedForMedia(const GURL& url) {
   return false;
 }
 
 }  // namespace content