Add always-on-top property to app windows

ui/views/widget/desktop_aura/desktop_root_window_host_x11.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_X11_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_X11_H_
 
 #include <X11/Xlib.h>
 
 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
@@ skipping 88 matching lines @@
   virtual void Activate() OVERRIDE;
   virtual void Deactivate() OVERRIDE;
   virtual bool IsActive() const OVERRIDE;
   virtual void Maximize() OVERRIDE;
   virtual void Minimize() OVERRIDE;
   virtual void Restore() OVERRIDE;
   virtual bool IsMaximized() const OVERRIDE;
   virtual bool IsMinimized() const OVERRIDE;
   virtual bool HasCapture() const OVERRIDE;
   virtual void SetAlwaysOnTop(bool always_on_top) OVERRIDE;
+  virtual bool IsAlwaysOnTop() const OVERRIDE;
   virtual void SetWindowTitle(const string16& title) OVERRIDE;
   virtual void ClearNativeFocus() OVERRIDE;
   virtual Widget::MoveLoopResult RunMoveLoop(
       const gfx::Vector2d& drag_offset,
       Widget::MoveLoopSource source,
       Widget::MoveLoopEscapeBehavior escape_behavior) OVERRIDE;
   virtual void EndMoveLoop() OVERRIDE;
   virtual void SetVisibilityChangedAnimationsEnabled(bool value) OVERRIDE;
   virtual bool ShouldUseNativeFrame() OVERRIDE;
   virtual void FrameTypeChanged() OVERRIDE;
@@ skipping 105 matching lines @@
   // True if the window should be focused when the window is shown.
   bool focus_when_shown_;
 
   // The window manager state bits.
   std::set< ::Atom> window_properties_;
 
   // Local flag for fullscreen state to avoid a state mismatch between
   // server and local window_properties_ during app-initiated fullscreen.
   bool is_fullscreen_;
 
+  // True if the window should stay on top of most other windows.
+  bool is_always_on_top_;
+
   // We are owned by the RootWindow, but we have to have a back pointer to it.
   aura::RootWindow* root_window_;
 
   // aura:: objects that we own.
   scoped_ptr<aura::client::FocusClient> focus_client_;
   scoped_ptr<views::corewm::CursorManager> cursor_client_;
   scoped_ptr<DesktopDispatcherClient> dispatcher_client_;
   scoped_ptr<aura::client::ScreenPositionClient> position_client_;
   scoped_ptr<DesktopDragDropClientAuraX11> drag_drop_client_;
 
@@ skipping 24 matching lines @@
   // A list of all (top-level) windows that have been created but not yet
   // destroyed.
   static std::list<XID>* open_windows_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopRootWindowHostX11);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_X11_H_