Repaint windows on screen unlock.

ui/base/win/lock_state.h

Index: ui/base/win/lock_state.h
diff --git a/ui/base/win/lock_state.h b/ui/base/win/lock_state.h
new file mode 100644
index 0000000000000000000000000000000000000000..b99f358bea6439924e7169550e0b4f87e4dfd326
--- /dev/null
+++ b/ui/base/win/lock_state.h
@@ -0,0 +1,18 @@
+// Copyright (c) 2014 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_BASE_WIN_LOCK_STATE_H_
+#define UI_BASE_WIN_LOCK_STATE_H_
+
+#include "base/basictypes.h"
+#include "ui/base/ui_base_export.h"
+
+namespace ui {
+
+// Returns true if the screen is currently locked.
+UI_BASE_EXPORT bool IsWorkstationLocked();
+
+}  // namespace ui
+
+#endif  // UI_BASE_WIN_LOCK_STATE_H_