Move shelf item tooltip flag from delegate to item.

ash/wm/window_properties.h

 // Copyright (c) 2012 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 ASH_WM_WINDOW_PROPERTIES_H_
 #define ASH_WM_WINDOW_PROPERTIES_H_
 
 #include <stdint.h>
 
 #include "ash/ash_export.h"
 #include "ash/common/shelf/shelf_item_types.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace aura {
 template <typename T>
 struct WindowProperty;
 }
 
 namespace ash {
 namespace wm {
 class WindowState;
 }  // namespace wm
 
-// Shell-specific window property keys.
+// Shell-specific window property keys; some keys are exported for use in tests.
 
 // Alphabetical sort.
 
 // If this is set to true, the window stays in the same root window even if the
 // bounds outside of its root window is set.
-// This is exported as it's used in the tests.
 ASH_EXPORT extern const aura::WindowProperty<bool>* const kLockedToRootKey;
 
+// If true (and the window is a panel), it's attached to its shelf item.
+ASH_EXPORT extern const aura::WindowProperty<bool>* const kPanelAttachedKey;
+
 // A property key which stores the bounds to restore a window to. These take
 // preference over the current bounds/state. This is used by e.g. the always
 // maximized mode window manager.
 ASH_EXPORT extern const aura::WindowProperty<gfx::Rect*>* const
     kRestoreBoundsOverrideKey;
 
 // A property key which stores the bounds to restore a window to. These take
 // preference over the current bounds/state if |kRestoreBoundsOverrideKey| is
 // set. This is used by e.g. the always maximized mode window manager.
 ASH_EXPORT extern const aura::WindowProperty<ui::WindowShowState>* const
@@ skipping 14 matching lines @@
 
 // A property key to store WindowState in the window. The window state
 // is owned by the window.
 extern const aura::WindowProperty<wm::WindowState*>* const kWindowStateKey;
 
 // Alphabetical sort.
 
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_PROPERTIES_H_