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 aa8011a988ec184b2588e26a2f59b9c53d0bbe7c..43f11517ee769a44995afdab20e89e80b9137532 100644
--- a/content/shell/shell_content_renderer_client.h
+++ b/content/shell/shell_content_renderer_client.h
@@ -26,9 +26,11 @@ class ShellContentRendererClient : public ContentRendererClient {
       WebKit::WebPlugin** plugin) OVERRIDE;
   virtual bool HasErrorPage(int http_status_code,
                             std::string* error_domain) 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,