Fix flicker on tab switch on chromeos.

views/controls/native/native_view_host_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 VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_GTK_H_
 #define VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 #include <string>
@@ skipping 68 matching lines @@
   // Signal handle id for 'destroy' signal.
   gulong destroy_signal_id_;
 
   // Signal handle id for 'focus-in-event' signal.
   gulong focus_signal_id_;
 
   // The GtkFixed that contains the attached gfx::NativeView (used for
   // clipping).
   GtkWidget* fixed_;
 
+  // The native view contained within fixed_.
+  GtkWidget* host_widget_;

[sky, 2011/07/01 20:00:38]

How come you need to cache this? If it's because of lifetime, can you update the
comment.

[DaveMoore, 2011/07/01 20:13:34]

This is cached because by the time of the destructor (when we have to delete it)
the host_ has NULLed it out in some (not all) cases.
On 2011/07/01 20:00:38, sky wrote:

+
   DISALLOW_COPY_AND_ASSIGN(NativeViewHostGtk);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_GTK_H_