Fixes bug in instant where we would end up incorrectly using the

chrome/browser/ui/cocoa/browser_window_cocoa.h

 // Copyright (c) 2011 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_COCOA_BROWSER_WINDOW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_BROWSER_WINDOW_COCOA_H_
 #pragma once
 
 #include "base/memory/scoped_nsobject.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 90 matching lines @@
       TabContentsWrapper* tab_contents);
   virtual void ShowCreateChromeAppShortcutsDialog(Profile* profile,
                                                   const Extension* app);
   virtual void Cut();
   virtual void Copy();
   virtual void Paste();
   virtual void OpenTabpose();
   virtual void SetPresentationMode(bool presentation_mode);
   virtual bool InPresentationMode();
   virtual void ShowInstant(TabContentsWrapper* preview);
-  virtual void HideInstant(bool instant_is_active);
+  virtual void HideInstant();
   virtual gfx::Rect GetInstantBounds();
   virtual WindowOpenDisposition GetDispositionForPopupBounds(
       const gfx::Rect& bounds);
   virtual FindBar* CreateFindBar() OVERRIDE;
   virtual void ShowAvatarBubble(TabContents* tab_contents,
                                 const gfx::Rect& rect) OVERRIDE;
 
   // Overridden from NotificationObserver
   virtual void Observe(int type,
                        const NotificationSource& source,
@@ skipping 15 matching lines @@
   NotificationRegistrar registrar_;
   PrefChangeRegistrar pref_change_registrar_;
   Browser* browser_;  // weak, owned by controller
   BrowserWindowController* controller_;  // weak, owns us
   base::WeakPtrFactory<Browser> confirm_close_factory_;
   scoped_nsobject<NSString> pending_window_title_;
   ui::WindowShowState initial_show_state_;
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_BROWSER_WINDOW_COCOA_H_