Add always-on-top property to app windows

ui/views/widget/desktop_aura/desktop_root_window_host.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_ROOT_WINDOW_HOST_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/views/views_export.h"
@@ skipping 72 matching lines @@
   virtual bool IsActive() const = 0;
   virtual void Maximize() = 0;
   virtual void Minimize() = 0;
   virtual void Restore() = 0;
   virtual bool IsMaximized() const = 0;
   virtual bool IsMinimized() const = 0;
 
   virtual bool HasCapture() const = 0;
 
   virtual void SetAlwaysOnTop(bool always_on_top) = 0;
+  virtual bool IsAlwaysOnTop() const = 0;
 
   virtual void SetWindowTitle(const string16& title) = 0;
 
   virtual void ClearNativeFocus() = 0;
 
   virtual Widget::MoveLoopResult RunMoveLoop(
       const gfx::Vector2d& drag_offset,
       Widget::MoveLoopSource source,
       Widget::MoveLoopEscapeBehavior escape_behavior) = 0;
   virtual void EndMoveLoop() = 0;
@@ skipping 20 matching lines @@
 
   // Called when the DesktopNativeWidgetAura's aura::Window is focused and
   // blurred.
   virtual void OnNativeWidgetFocus() = 0;
   virtual void OnNativeWidgetBlur() = 0;
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_H_