Support auto-hide taskbar for panels on Windows.

views/widget/monitor_win.h

 // 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.
 
 #ifndef VIEWS_WIDGET_MONITOR_WIN_H_
 #define VIEWS_WIDGET_MONITOR_WIN_H_
 #pragma once
 
+#include <windows.h>
 #include "views/views_export.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace views {
 
 // Returns the bounds for the monitor that contains the largest area of
 // intersection with the specified rectangle.
 VIEWS_EXPORT gfx::Rect GetMonitorBoundsForRect(const gfx::Rect& rect);
 
+// Returns true if edge |edge| (one of ABE_LEFT, TOP, RIGHT, or BOTTOM) of
+// monitor |monitor| has an auto-hiding taskbar that's always-on-top.
+VIEWS_EXPORT bool EdgeHasTopmostAutoHideTaskbar(UINT edge, HMONITOR monitor);
+
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_MONITOR_WIN_H_