gtk: Move ScopedRegion into scoped_region.{h,cc}.

chrome/browser/ui/gtk/tabs/tab_gtk.cc

Index: chrome/browser/ui/gtk/tabs/tab_gtk.cc
diff --git a/chrome/browser/ui/gtk/tabs/tab_gtk.cc b/chrome/browser/ui/gtk/tabs/tab_gtk.cc
index e32085cff1bf552c6c3fe4c021543ebcf1699d45..8776ec39b36093af3084fa62db02ab60ee23ba6c 100644
--- a/chrome/browser/ui/gtk/tabs/tab_gtk.cc
+++ b/chrome/browser/ui/gtk/tabs/tab_gtk.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -21,7 +21,7 @@
 #include "grit/theme_resources.h"
 #include "ui/base/accelerators/accelerator_gtk.h"
 #include "ui/base/dragdrop/gtk_dnd_util.h"
-#include "ui/base/gtk/scoped_handle_gtk.h"
+#include "ui/base/gtk/scoped_region.h"
 #include "ui/gfx/path.h"
 
 using content::WebContents;