Make using WebContentsUserData simpler.

chrome/browser/captive_portal/captive_portal_tab_helper.h

 // 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.
 
 #ifndef CHROME_BROWSER_CAPTIVE_PORTAL_CAPTIVE_PORTAL_TAB_HELPER_H_
 #define CHROME_BROWSER_CAPTIVE_PORTAL_CAPTIVE_PORTAL_TAB_HELPER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 86 matching lines @@
 
   // A "Login Tab" is a tab that was originally at a captive portal login
   // page.  This is set to false when a captive portal is no longer detected.
   bool IsLoginTab() const;
 
  private:
   friend class CaptivePortalBrowserTest;
   friend class CaptivePortalTabHelperTest;
 
   friend class WebContentsUserData<CaptivePortalTabHelper>;
-  static int kUserDataKey;
   explicit CaptivePortalTabHelper(content::WebContents* web_contents);
 
   // Called by Observe in response to the corresponding event.
   void OnRedirect(int child_id,
                   ResourceType::Type resource_type,
                   const GURL& new_url);
 
   // Called by Observe in response to the corresponding event.
   void OnCaptivePortalResults(Result previous_result, Result result);
 
@@ skipping 33 matching lines @@
   content::RenderViewHost* provisional_render_view_host_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(CaptivePortalTabHelper);
 };
 
 }  // namespace captive_portal
 
 #endif  // CHROME_BROWSER_CAPTIVE_PORTAL_CAPTIVE_PORTAL_TAB_HELPER_H_