Add always-on-top property to app windows

ui/views/widget/desktop_aura/desktop_native_widget_aura.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_DESKTOP_AURA_DESKTOP_NATIVE_WIDGET_AURA_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_NATIVE_WIDGET_AURA_H_
 
 #include "base/memory/weak_ptr.h"
 #include "ui/aura/client/activation_change_observer.h"
 #include "ui/aura/client/activation_delegate.h"
@@ skipping 121 matching lines @@
   virtual void Show() OVERRIDE;
   virtual void Hide() OVERRIDE;
   virtual void ShowMaximizedWithBounds(
       const gfx::Rect& restored_bounds) OVERRIDE;
   virtual void ShowWithWindowState(ui::WindowShowState state) OVERRIDE;
   virtual bool IsVisible() const OVERRIDE;
   virtual void Activate() OVERRIDE;
   virtual void Deactivate() OVERRIDE;
   virtual bool IsActive() const OVERRIDE;
   virtual void SetAlwaysOnTop(bool always_on_top) OVERRIDE;
+  virtual bool IsAlwaysOnTop() const OVERRIDE;
   virtual void Maximize() OVERRIDE;
   virtual void Minimize() OVERRIDE;
   virtual bool IsMaximized() const OVERRIDE;
   virtual bool IsMinimized() const OVERRIDE;
   virtual void Restore() OVERRIDE;
   virtual void SetFullscreen(bool fullscreen) OVERRIDE;
   virtual bool IsFullscreen() const OVERRIDE;
   virtual void SetOpacity(unsigned char opacity) OVERRIDE;
   virtual void SetUseDragFrame(bool use_drag_frame) OVERRIDE;
   virtual void FlashFrame(bool flash_frame) OVERRIDE;
@@ skipping 141 matching lines @@
 
   // See class documentation for Widget in widget.h for a note about type.
   Widget::InitParams::Type widget_type_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopNativeWidgetAura);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_NATIVE_WIDGET_AURA_H_