Disables showing tooltips while a system menu is showing on windows

ui/aura/client/scoped_tooltip_disabler.h

Index: ui/aura/client/scoped_tooltip_disabler.h
diff --git a/ui/aura/client/scoped_tooltip_disabler.h b/ui/aura/client/scoped_tooltip_disabler.h
new file mode 100644
index 0000000000000000000000000000000000000000..9514de312175b6a4b2062838ef0a6afd81085b90
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+++ b/ui/aura/client/scoped_tooltip_disabler.h
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+// 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_AURA_CLIENT_SCOPED_TOOLTIP_DISABLER_H_
+#define UI_AURA_CLIENT_SCOPED_TOOLTIP_DISABLER_H_
+
+#include "ui/aura/window_observer.h"
+
+namespace aura {
+namespace client {
+
+// Use to temporarily disable tooltips.
+class AURA_EXPORT ScopedTooltipDisabler : aura::WindowObserver {
+ public:
+  // Disables tooltips on |window| (does nothing if |window| is NULL). Tooltips
+  // are reenabled from the destructor when there are no most outstanding
+  // ScopedTooltipDisablers for |window|.
+  explicit ScopedTooltipDisabler(aura::Window* window);
+  virtual ~ScopedTooltipDisabler();
+
+ private:
+  // Reenables the tooltips on the TooltipClient.
+  void EnableTooltips();
+
+  // aura::WindowObserver:
+  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
+
+  // The RootWindow to disable Tooltips on; NULL if the Window passed to the
+  // constructor was not in a root or the root has been destroyed.
+  aura::Window* root_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedTooltipDisabler);
+};
+
+}  // namespace client
+}  // namespace aura
+
+#endif  // UI_AURA_CLIENT_SCOPED_TOOLTIP_DISABLER_H_