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

chrome/browser/extensions/app_notify_channel_setup.cc

Index: chrome/browser/extensions/app_notify_channel_setup.cc
diff --git a/chrome/browser/extensions/app_notify_channel_setup.cc b/chrome/browser/extensions/app_notify_channel_setup.cc
index e178cd5fc6682edbb009ed23a7af4ab1ed0b5c80..22bdb668c48f5eeb4b8f4a7a287eb8ba9fe1470e 100644
--- a/chrome/browser/extensions/app_notify_channel_setup.cc
+++ b/chrome/browser/extensions/app_notify_channel_setup.cc
@@ -23,6 +23,7 @@
 #include "chrome/common/net/gaia/gaia_urls.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/common/content_url_request_user_data.h"
 #include "content/public/common/url_fetcher.h"
 #include "net/base/escape.h"
 #include "net/base/load_flags.h"
@@ -138,6 +139,9 @@ URLFetcher* AppNotifyChannelSetup::CreateURLFetcher(
       body.empty() ? URLFetcher::GET : URLFetcher::POST;
   URLFetcher* fetcher = URLFetcher::Create(0, url, type, this);
   fetcher->SetRequestContext(profile_->GetRequestContext());
+  // No user data, as the request will be cookie-less.
+  fetcher->SetContentURLRequestUserData(
+      new content::ContentURLRequestUserData());
   // Always set flags to neither send nor save cookies.
   fetcher->SetLoadFlags(
       net::LOAD_DO_NOT_SEND_COOKIES | net::LOAD_DO_NOT_SAVE_COOKIES);