Add in gesture for immersive mode

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 "ash/ash_export.h"
 #include "ash/wm/property_util.h"
 #include "ui/aura/window.h"
@@ skipping 36 matching lines @@
 // darkening the shelf.
 extern const aura::WindowProperty<bool>* const
     kIgnoredByShelfKey;
 
 // True if this is a browser window in immersive mode.
 ASH_EXPORT extern const aura::WindowProperty<bool>* const kImmersiveModeKey;
 
 // True if this window is an attached panel.
 ASH_EXPORT extern const aura::WindowProperty<bool>* const kPanelAttachedKey;
 
+// True if there is a pending immersive gesture occurance for this window.
+ASH_EXPORT extern const aura::WindowProperty<bool>* const
+    kPendingImmersiveGestureKey;
+
 // Used to remember the show state before the window was minimized.
 extern const aura::WindowProperty<ui::WindowShowState>* const
     kRestoreShowStateKey;
 
 extern const aura::WindowProperty<RootWindowController*>* const
     kRootWindowControllerKey;
 
 // RootWindow property to indicate if the window in the active workspace should
 // use the transparent "solo-window" header style.
 ASH_EXPORT extern const aura::WindowProperty<bool>* const
@@ skipping 34 matching lines @@
 // True if the window is controlled by the workspace manager.
 extern const aura::WindowProperty<bool>* const
     kWindowTrackedByWorkspaceKey;
 
 // Alphabetical sort.
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_PROPERTIES_H_