[Aura] Support always-on-top top level window.

ui/aura/window.cc

 // 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.
 
 #include "ui/aura/window.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "ui/aura/desktop.h"
 #include "ui/aura/desktop_delegate.h"
 #include "ui/aura/event.h"
 #include "ui/aura/event_filter.h"
 #include "ui/aura/layout_manager.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/aura/window_observer.h"
 #include "ui/aura/window_types.h"
 #include "ui/base/animation/multi_animation.h"
 #include "ui/base/view_prop.h"
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/compositor/compositor.h"
 #include "ui/gfx/screen.h"
 
 namespace aura {
 
+// static
+const char Window::kPropAlwaysOnTop[] = "AlwaysOnTop";

[oshima, 2011/11/01 18:35:21]

move this to ui/aura/aura_constants.cc

[xiyuan, 2011/11/02 23:26:32]

Done.

+
 Window::Window(WindowDelegate* delegate)
     : type_(kWindowType_None),
       delegate_(delegate),
       show_state_(ui::SHOW_STATE_NORMAL),
       parent_(NULL),
       transient_parent_(NULL),
       id_(-1),
       user_data_(NULL),
       stops_event_propagation_(false) {
 }
@@ skipping 495 matching lines @@
 
 void Window::OnPaintLayer(gfx::Canvas* canvas) {
   delegate_->OnPaint(canvas);
 }
 
 void Window::OnLayerAnimationEnded(
     const ui::LayerAnimationSequence* animation) {
 }
 
 }  // namespace aura