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

content/common/net/url_request_user_data.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/common/net/url_request_user_data.h"
+
+URLRequestUserData::URLRequestUserData(int render_process_id,
+                                       int render_view_id)
+    : render_process_id_(render_process_id),
+      render_view_id_(render_view_id) {}
+
+URLRequestUserData::~URLRequestUserData() {}
+
+// static
+const void* URLRequestUserData::kUserDataKey =
+    static_cast<const void*>(&URLRequestUserData::kUserDataKey);