Shell related switches -> aura shell switches.

ui/aura/client/tooltip_client.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 UI_AURA_CLIENT_TOOLTIP_CLIENT_H_
 #define UI_AURA_CLIENT_TOOLTIP_CLIENT_H_
 #pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/aura/event.h"
 #include "ui/gfx/font.h"
 
 namespace aura {
 class Window;
 namespace client {
 
+// A property key to store the tooltip client for the root window. The type of
+// the value is |aura::client::TooltipClient*|.
+AURA_EXPORT extern const char kRootWindowTooltipClientKey[];
+
+// A property key to store tooltip text for a window. The type of the value
+// is |string16*|.
+AURA_EXPORT extern const char kTooltipTextKey[];
+
 class AURA_EXPORT TooltipClient {
  public:
   // Informs the shell tooltip manager of change in tooltip for window |target|.
   virtual void UpdateTooltip(Window* target) = 0;
 };
 
 AURA_EXPORT void SetTooltipClient(TooltipClient* client);
 AURA_EXPORT TooltipClient* GetTooltipClient();
 AURA_EXPORT void SetTooltipText(Window* window, string16* tooltip_text);
 AURA_EXPORT string16* GetTooltipText(Window* window);
 
 }  // namespace client
 }  // namespace aura
 
 #endif  // UI_AURA_CLIENT_TOOLTIP_CLIENT_H_