Add error description to the DidFailProvisionalLoad callback.

content/public/renderer/content_renderer_client.h

Index: content/public/renderer/content_renderer_client.h
diff --git a/content/public/renderer/content_renderer_client.h b/content/public/renderer/content_renderer_client.h
index 3ed428b355021854c81604172f4364e2a6a33293..adb967207d7524912666210773e101a56997243b 100644
--- a/content/public/renderer/content_renderer_client.h
+++ b/content/public/renderer/content_renderer_client.h
@@ -72,6 +72,11 @@ class ContentRendererClient {
       const WebKit::WebURLRequest& failed_request,
       const WebKit::WebURLError& error) = 0;
 
+  // Returns the error message that is shown when a navigation error occurs.
+  virtual string16 GetNavigationErrorDescription(

[jam, 2011/10/05 17:12:06]

why add another function instead of an extra parameter? we try to keep embedder
functions to a minimum

[mkosiba (inactive), 2011/10/05 17:53:18]

You mean have one function return both/either the error description and the
error html? Is it acceptable if the function takes out* pointers that are filled
with data only if the pointer is not null? 

[jam, 2011/10/05 19:33:57]

sure

+      const WebKit::WebURLRequest& failed_request,
+      const WebKit::WebURLError& error) = 0;
+
   // Returns true if the renderer process should schedule the idle handler when
   // all widgets are hidden.
   virtual bool RunIdleHandlerWhenWidgetsHidden() = 0;