Fixes bug in instant that resulted in flickery fade. The problem would

chrome/browser/gtk/browser_window_gtk.h

 // Copyright (c) 2010 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_GTK_BROWSER_WINDOW_GTK_H_
 #define CHROME_BROWSER_GTK_BROWSER_WINDOW_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 110 matching lines @@
   virtual void HandleKeyboardEvent(const NativeWebKeyboardEvent& event);
   virtual void ShowCreateWebAppShortcutsDialog(TabContents*  tab_contents);
   virtual void ShowCreateChromeAppShortcutsDialog(Profile* profile,
                                                   const Extension* app);
   virtual void Cut();
   virtual void Copy();
   virtual void Paste();
   virtual void ToggleTabStripMode() {}
   virtual void PrepareForInstant();
   virtual void ShowInstant(TabContents* preview_contents);
-  virtual void HideInstant();
+  virtual void HideInstant(bool instant_is_active);
   virtual gfx::Rect GetInstantBounds();
 
   // Overridden from NotificationObserver:
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   // Overridden from TabStripModelObserver:
   virtual void TabDetachedAt(TabContentsWrapper* contents, int index);
   virtual void TabSelectedAt(TabContentsWrapper* old_contents,
@@ skipping 342 matching lines @@
   scoped_ptr<FullscreenExitBubbleGtk> fullscreen_exit_bubble_;
 
   // The model that tracks the paint state of the arrow for the infobar
   // directly below the toolbar.
   InfoBarArrowModel infobar_arrow_model_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserWindowGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_BROWSER_WINDOW_GTK_H_