Implement local storage for App List in case app sync is off.

chrome/common/pref_names.cc

 // 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.
 
 #include "chrome/common/pref_names.h"
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/common/features.h"
 #include "chrome/common/pref_font_webkit_names.h"
@@ skipping 2029 matching lines @@
 const char kShelfAlignmentLocal[] = "shelf_alignment_local";
 // String value corresponding to ash::Shell::ShelfAutoHideBehavior.
 const char kShelfAutoHideBehavior[] = "auto_hide_behavior";
 const char kShelfAutoHideBehaviorLocal[] = "auto_hide_behavior_local";
 // This value stores chrome icon's index in the launcher. This should be handled
 // separately with app shortcut's index because of ShelfModel's backward
 // compatibility. If we add chrome icon index to |kPinnedLauncherApps|, its
 // index is also stored in the |kPinnedLauncherApp| pref. It may causes
 // creating two chrome icons.
 const char kShelfChromeIconIndex[] = "shelf_chrome_icon_index";
+// This value stores shelf positions to store pin position for local machine in
+// case sync app list is turned off.
+const char kShelfPins[] = "shelf_pins";
 // Dictionary value that holds per-display preference of shelf alignment and
 // auto-hide behavior. Key of the dictionary is the id of the display, and
 // its value is a dictionary whose keys are kShelfAlignment and
 // kShelfAutoHideBehavior.
 const char kShelfPreferences[] = "shelf_preferences";
 
 // Integer value in milliseconds indicating the length of time for which a
 // confirmation dialog should be shown when the user presses the logout button.
 // A value of 0 indicates that logout should happen immediately, without showing
 // a confirmation dialog.
@@ skipping 217 matching lines @@
 const char kOriginTrialPublicKey[] = "origin_trials.public_key";
 
 // A list of origin trial features to disable by policy.
 const char kOriginTrialDisabledFeatures[] = "origin_trials.disabled_features";
 
 // Policy that indicates the state of updates for the binary components.
 const char kComponentUpdatesEnabled[] =
     "component_updates.component_updates_enabled";
 
 }  // namespace prefs