Support auto-hide taskbar for panels on Windows.

views/widget/native_widget_win.cc

Index: views/widget/native_widget_win.cc
===================================================================
--- views/widget/native_widget_win.cc	(revision 96619)
+++ views/widget/native_widget_win.cc	(working copy)
@@ -39,6 +39,7 @@
 #include "views/widget/aero_tooltip_manager.h"
 #include "views/widget/child_window_message_processor.h"
 #include "views/widget/drop_target_win.h"
+#include "views/widget/monitor_win.h"
 #include "views/widget/native_widget_delegate.h"
 #include "views/widget/native_widget_views.h"
 #include "views/widget/root_view.h"
@@ -285,19 +286,6 @@
   return true;
 }
 
-// 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.
-bool EdgeHasTopmostAutoHideTaskbar(UINT edge, HMONITOR monitor) {
-  APPBARDATA taskbar_data = { 0 };
-  taskbar_data.cbSize = sizeof APPBARDATA;
-  taskbar_data.uEdge = edge;
-  HWND taskbar = reinterpret_cast<HWND>(SHAppBarMessage(ABM_GETAUTOHIDEBAR,
-                                                        &taskbar_data));
-  return ::IsWindow(taskbar) && (monitor != NULL) &&
-      (MonitorFromWindow(taskbar, MONITOR_DEFAULTTONULL) == monitor) &&
-      (GetWindowLong(taskbar, GWL_EXSTYLE) & WS_EX_TOPMOST);
-}
-
 // Links the HWND to its NativeWidget.
 const char* const kNativeWidgetKey = "__VIEWS_NATIVE_WIDGET__";