Remove TabContents from TabStripModelObserver::TabReplacedAt.

chrome/browser/ui/tabs/tab_strip_model_observer.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_TABS_TAB_STRIP_MODEL_OBSERVER_H_
 #define CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_OBSERVER_H_
 
-class TabContents;
 class TabStripModel;
 class TabStripSelectionModel;
 
 namespace content {
 class WebContents;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 //
 // TabStripModelObserver
 //
 //  Objects implement this interface when they wish to be notified of changes
 //  to the TabStripModel.
 //
 //  Two major implementers are the TabStrip, which uses notifications sent
 //  via this interface to update the presentation of the strip, and the Browser
-//  object, which updates bookkeeping and shows/hides individual TabContentses.
+//  object, which updates bookkeeping and shows/hides individual WebContentses.
 //
 //  Register your TabStripModelObserver with the TabStripModel using its
 //  Add/RemoveObserver methods.
 //
 ////////////////////////////////////////////////////////////////////////////////
 class TabStripModelObserver {
  public:
   // Enumeration of the possible values supplied to TabChangedAt.
   enum TabChangeType {
     // Only the loading state changed.
@@ skipping 61 matching lines @@
 
   // The specified WebContents at |index| changed in some way. |contents|
   // may be an entirely different object and the old value is no longer
   // available by the time this message is delivered.
   //
   // See TabChangeType for a description of |change_type|.
   virtual void TabChangedAt(content::WebContents* contents,
                             int index,
                             TabChangeType change_type);
 
-  // The tab contents was replaced at the specified index. This is invoked
+  // The WebContents was replaced at the specified index. This is invoked
   // when instant is enabled and the user navigates by way of instant or when
-  // prerendering swaps in a prerendered TabContents.
+  // prerendering swaps in a prerendered WebContents.
   virtual void TabReplacedAt(TabStripModel* tab_strip_model,
-                             TabContents* old_contents,
-                             TabContents* new_contents,
+                             content::WebContents* old_contents,
+                             content::WebContents* new_contents,
                              int index);
 
   // Invoked when the pinned state of a tab changes. See note in
   // TabMiniStateChanged as to how this relates to TabMiniStateChanged.
   virtual void TabPinnedStateChanged(content::WebContents* contents, int index);
 
   // Invoked if the mini state of a tab changes.
   // NOTE: This is sent when the pinned state of a non-app tab changes and is
   // sent in addition to TabPinnedStateChanged. UI code typically need not care
   // about TabPinnedStateChanged, but instead this.
@@ skipping 12 matching lines @@
 
   // Sent when the tabstrip model is about to be deleted and any reference held
   // must be dropped.
   virtual void TabStripModelDeleted();
 
  protected:
   virtual ~TabStripModelObserver() {}
 };
 
 #endif  // CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_OBSERVER_H_