Add always-on-top property to app windows

ui/views/win/hwnd_message_handler.cc

Index: ui/views/win/hwnd_message_handler.cc
diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
index f7b624ee8ab5c1deace5dc03862f34f47d124d86..fa19a13495ccacbc3d52bcf7a81448d0662ef849 100644
--- a/ui/views/win/hwnd_message_handler.cc
+++ b/ui/views/win/hwnd_message_handler.cc
@@ -686,6 +686,10 @@ bool HWNDMessageHandler::IsMaximized() const {
   return !!::IsZoomed(hwnd());
 }
 
+bool HWNDMessageHandler::IsAlwaysOnTop() const {
+  return (GetWindowLong(hwnd(), GWL_EXSTYLE) & WS_EX_TOPMOST) > 0;

[sky, 2013/10/10 02:45:57]

== WS_EX_TOPMOST?

[tmdiep, 2013/10/10 04:02:01]

Changed to != 0.

+}
+
 bool HWNDMessageHandler::RunMoveLoop(const gfx::Vector2d& drag_offset,
                                      bool hide_on_escape) {
   ReleaseCapture();