AURA/X11: Handle VKEY_MENU accelerator on content area

ui/views/widget/native_widget_gtk.h

 // 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.
 
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_GTK_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 423 matching lines @@
   bool has_focus_;
 
   // If true, the window stays on top of the screen. This is only used
   // for types other than TYPE_CHILD.
   bool always_on_top_;
 
   // If true, we enable the content widget's double buffering.
   // This is false by default.
   bool is_double_buffered_;
 
-  // Indicates if we should handle the upcoming Alt key release event.
-  bool should_handle_menu_key_release_;
-
   // Valid for the lifetime of StartDragForViewFromMouseEvent, indicates the
   // view the drag started from.
   View* dragged_view_;
 
   // If the widget has ever been painted. This is used to guarantee
   // that window manager shows the window only after the window is painted.
   bool painted_;
 
   // The compositor for accelerated drawing.
   scoped_refptr<ui::Compositor> compositor_;
@@ skipping 12 matching lines @@
   bool is_menu_;
 
   scoped_ptr<ui::GtkSignalRegistrar> signal_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetGtk);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_NATIVE_WIDGET_GTK_H_