Switch SearchTabHelper to use WebContentsUserData.

chrome/browser/ui/search/search_delegate.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_UI_SEARCH_SEARCH_DELEGATE_H_
 #define CHROME_BROWSER_UI_SEARCH_SEARCH_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/ui/search/search_model_observer.h"
 #include "chrome/browser/ui/search/toolbar_search_animator.h"
 
-class TabContents;
 class ToolbarModel;
 
+namespace content {
+class WebContents;
+}
+
 namespace chrome {
 namespace search {
 
 class SearchModel;
 
 // The SearchDelegate class acts as a helper to the Browser class.
 // It is responsible for routing the changes from the active tab's
 // SearchModel through to the toolbar, tabstrip and other UI
 // observers.
 // Changes are propagated from the active tab's model via this class to the
 // Browser-level model.
 class SearchDelegate : public SearchModelObserver {
  public:
   SearchDelegate(SearchModel* browser_search_model,
                  ToolbarModel* toolbar_model);
   virtual ~SearchDelegate();
 
   // Overrides for SearchModelObserver:
   virtual void ModeChanged(const Mode& old_mode, const Mode& new_mode) OVERRIDE;
 
   // When the active tab is changed, the model state of this new active tab is
   // propagated to the browser.
-  void OnTabActivated(TabContents* contents);
+  void OnTabActivated(content::WebContents* web_contents);
 
   // When a tab is deactivated, this class no longer observes changes to the
   // tab's model.
-  void OnTabDeactivated(TabContents* contents);
+  void OnTabDeactivated(content::WebContents* web_contents);
 
   // When a tab is detached, this class no longer observes changes to the
   // tab's model.
-  void OnTabDetached(TabContents* contents);
+  void OnTabDetached(content::WebContents* web_contents);
 
   ToolbarSearchAnimator& toolbar_search_animator() {
     return toolbar_search_animator_;
   }
 
  private:
   // Stop observing tab.
-  void StopObserveringTab(TabContents* contents);
+  void StopObservingTab(content::WebContents* web_contents);
 
   // Weak.  The Browser class owns this.  The active |tab_model_| state is
   // propagated to the |browser_model_|.
   SearchModel* browser_model_;
 
   // Weak.  The TabContents owns this.  It is the model of the active
   // tab.  Changes to this model are propagated through to the |browser_model_|.
   SearchModel* tab_model_;
 
   // Animator for fading in toolbar and tab backgrounds when mode changes from
   // NTP to SEARCH.
   ToolbarSearchAnimator toolbar_search_animator_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchDelegate);
 };
 
 }  // namespace search
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_SEARCH_SEARCH_DELEGATE_H_