Remove task.h and finish base::Bind() migration.

chrome/browser/ui/gtk/constrained_window_gtk.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_GTK_CONSTRAINED_WINDOW_GTK_H_
 #define CHROME_BROWSER_UI_GTK_CONSTRAINED_WINDOW_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
-#include "base/task.h"
 #include "chrome/browser/ui/constrained_window.h"
 #include "ui/base/gtk/gtk_signal.h"
 #include "ui/base/gtk/owned_widget_gtk.h"
 
 class TabContentsWrapper;
 typedef struct _GdkColor GdkColor;
 #if defined(TOOLKIT_VIEWS)
 class NativeTabContentsViewGtk;
 #else
 class ChromeTabContentsViewWrapperGtk;
@@ skipping 69 matching lines @@
 
   // Stores if |ShowConstrainedWindow()| has been called.
   bool visible_;
 
   base::WeakPtrFactory<ConstrainedWindowGtk> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ConstrainedWindowGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_CONSTRAINED_WINDOW_GTK_H_