Add error description to the DidFailProvisionalLoad callback.

content/renderer/mock_content_renderer_client.cc

Index: content/renderer/mock_content_renderer_client.cc
diff --git a/content/renderer/mock_content_renderer_client.cc b/content/renderer/mock_content_renderer_client.cc
index b8a8e6de758b0c717e1ae2d1d758f643906794f1..22d28447fcc78beebdb6911df48ff17ae4358979 100644
--- a/content/renderer/mock_content_renderer_client.cc
+++ b/content/renderer/mock_content_renderer_client.cc
@@ -42,10 +42,15 @@ void MockContentRendererClient::ShowErrorPage(RenderView* render_view,
                                               int http_status_code) {
 }
 
-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) {
+  if (error_html != NULL)

[jam, 2011/10/07 16:03:28]

nit: we prefer to have empty functions in the mock where possible. the caller
should make sure that they pass empty strings, so that not every embedder has to
do this work.

[mkosiba (inactive), 2011/10/07 17:54:32]

Done.

+    *error_html = std::string();
+  if (error_description != NULL)
+    *error_description = string16();
 }
 
 bool MockContentRendererClient::RunIdleHandlerWhenWidgetsHidden() {