ash: Fix shelf auto hide behavior not persisted regression.

chrome/common/pref_names.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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 #pragma once
 
@@ skipping 650 matching lines @@
 extern const char kUserPolicyRefreshRate[];
 
 extern const char kRecoveryComponentVersion[];
 extern const char kComponentUpdaterState[];
 
 extern const char kRestoreSessionStateDialogShown[];
 
 extern const char kWebIntentsEnabled[];
 
 #if defined(USE_AURA)
-extern const char kAlwaysAutoHideShelf[];
 extern const char kShelfAutoHideBehavior[];
 extern const char kUseDefaultPinnedApps[];
 extern const char kPinnedLauncherApps[];
 
 extern const char kLongPressTimeInSeconds[];
 extern const char kMaxSecondsBetweenDoubleClick[];
 extern const char kMaxSeparationForGestureTouchesInPixels[];
 extern const char kMaxSwipeDeviationRatio[];
 extern const char kMaxTouchDownDurationInSecondsForClick[];
 extern const char kMaxTouchMoveInPixelsForClick[];
 extern const char kMinDistanceForPinchScrollInPixels[];
 extern const char kMinFlickSpeedSquared[];
 extern const char kMinPinchUpdateDistanceInPixels[];
 extern const char kMinRailBreakVelocity[];
 extern const char kMinScrollDeltaSquared[];
 extern const char kMinSwipeSpeed[];
 extern const char kMinTouchDownDurationInSecondsForClick[];
 extern const char kPointsBufferedForVelocity[];
 extern const char kRailBreakProportion[];
 extern const char kRailStartProportion[];
 #endif
 
 extern const char kInManagedMode[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_