Add error description to the DidFailProvisionalLoad callback.

content/shell/shell_content_renderer_client.h

Index: content/shell/shell_content_renderer_client.h
diff --git a/content/shell/shell_content_renderer_client.h b/content/shell/shell_content_renderer_client.h
index 05449ee4842383a9c49f33bba1e66ada6ba17729..d39bc184be10b504ac315f65c9b9cd193c1332f9 100644
--- a/content/shell/shell_content_renderer_client.h
+++ b/content/shell/shell_content_renderer_client.h
@@ -27,9 +27,11 @@ class ShellContentRendererClient : public ContentRendererClient {
   virtual void ShowErrorPage(RenderView* render_view,
                              WebKit::WebFrame* frame,
                              int http_status_code) OVERRIDE;
-  virtual std::string GetNavigationErrorHtml(
+  virtual void GetNavigationErrorStrings(
       const WebKit::WebURLRequest& failed_request,
-      const WebKit::WebURLError& error) OVERRIDE;
+      const WebKit::WebURLError& error,
+      std::string* error_html,
+      string16* error_description) OVERRIDE;
   virtual bool RunIdleHandlerWhenWidgetsHidden() OVERRIDE;
   virtual bool AllowPopup(const GURL& creator) OVERRIDE;
   virtual bool ShouldFork(WebKit::WebFrame* frame,