Add error description to the DidFailProvisionalLoad callback.

content/shell/shell_content_renderer_client.cc

Index: content/shell/shell_content_renderer_client.cc
diff --git a/content/shell/shell_content_renderer_client.cc b/content/shell/shell_content_renderer_client.cc
index ea94b90d30a49273ae03b89730ac1c6ab0cab3ad..4b9d698f828a13087f9f6599aa27c0fe0b793d7c 100644
--- a/content/shell/shell_content_renderer_client.cc
+++ b/content/shell/shell_content_renderer_client.cc
@@ -41,10 +41,15 @@ void ShellContentRendererClient::ShowErrorPage(RenderView* render_view,
                                                int http_status_code) {
 }
 
-std::string ShellContentRendererClient::GetNavigationErrorHtml(
+void ShellContentRendererClient::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)
+    *error_html = std::string();
+  if (error_description != NULL)
+    *error_description = string16();
 }
 
 bool ShellContentRendererClient::RunIdleHandlerWhenWidgetsHidden() {