Switch CoreTabHelper to use WebContentsUserData.

chrome/browser/instant/instant_loader.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_INSTANT_INSTANT_LOADER_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string16.h"
 #include "chrome/browser/instant/instant_commit_type.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 struct InstantAutocompleteResult;
 class InstantLoaderDelegate;
 class TabContents;
 
 namespace content {
 class NotificationDetails;
 class NotificationSource;
+class WebContents;
 }
 
 namespace gfx {
 class Rect;
 }
 
 namespace history {
 class HistoryAddPageArgs;
 }
 
@@ skipping 66 matching lines @@
   // content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
  private:
   class WebContentsDelegateImpl;
 
   void SetupPreviewContents();
   void CleanupPreviewContents();
-  void ReplacePreviewContents(TabContents* old_tc, TabContents* new_tc);
+  void ReplacePreviewContents(content::WebContents* old_contents,
+                              content::WebContents* new_contents);
 
   InstantLoaderDelegate* const loader_delegate_;
 
   // See comments on the getter above.
   scoped_ptr<TabContents> preview_contents_;
 
   // Delegate of the preview WebContents. Used to detect when the user does some
   // gesture on the WebContents and the preview needs to be activated.
   scoped_ptr<WebContentsDelegateImpl> preview_delegate_;
 
   // See comments on the getter above.
   bool supports_instant_;
 
   // See comments on the getter above.
   const std::string instant_url_;
 
   // Used to get notifications about renderers coming and going.
   content::NotificationRegistrar registrar_;
 
   // See comments on the getter above.
   scoped_refptr<history::HistoryAddPageArgs> last_navigation_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantLoader);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_