Do cookie checks in NetworkDelegate instead of the URLRequest::Delegate.

chrome/browser/tab_contents/render_view_context_menu.h

Index: chrome/browser/tab_contents/render_view_context_menu.h
diff --git a/chrome/browser/tab_contents/render_view_context_menu.h b/chrome/browser/tab_contents/render_view_context_menu.h
index 44780117483d7011c8220763d4262837b83dd017..d53136232324ae34944af2ec2c1a4aca4140fb4d 100644
--- a/chrome/browser/tab_contents/render_view_context_menu.h
+++ b/chrome/browser/tab_contents/render_view_context_menu.h
@@ -73,6 +73,10 @@ struct WebPluginAction;
 //     void Start(const GURL* url, net::URLRequestContextGetter* context) {
 //       fetcher_.reset(new URLFetcher(url, URLFetcher::GET, this));
 //       fetcher_->SetRequestContext(context);
+//       fetcher_->SetContentURLRequestUserData(
+//           new content::ContentURLRequestUserData(
+//               proxy_->GetRenderViewHost()->process()->GetID(),
+//               proxy_->GetRenderViewHost()->routing_id()));
 //       fetcher_->Start();
 //     }
 //