Implement "pinned" mode in ash.

ash/accelerators/accelerator_table.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_ACCELERATORS_ACCELERATOR_TABLE_H_
 #define ASH_ACCELERATORS_ACCELERATOR_TABLE_H_
 
 #include <stddef.h>
 
 #include "ash/ash_export.h"
@@ skipping 229 matching lines @@
 ASH_EXPORT extern const size_t kActionsAllowedInAppModeLength;
 
 // Actions that require at least 1 window.
 ASH_EXPORT extern const AcceleratorAction kActionsNeedingWindow[];
 ASH_EXPORT extern const size_t kActionsNeedingWindowLength;
 
 // Actions that can be performed while keeping the menu open.
 ASH_EXPORT extern const AcceleratorAction kActionsKeepingMenuOpen[];
 ASH_EXPORT extern const size_t kActionsKeepingMenuOpenLength;
 
+// Actions that can be performed in pinned mode.
+ASH_EXPORT extern const AcceleratorAction kActionsAllowedInPinnedMode[];
+ASH_EXPORT extern const size_t kActionsAllowedInPinnedModeLength;
+
 }  // namespace ash
 
 #endif  // ASH_ACCELERATORS_ACCELERATOR_TABLE_H_