Enable sync for the settings from the Extension Settings API.

chrome/common/chrome_switches.cc

 // Copyright (c) 2011 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/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 501 matching lines @@
 
 // Enable the use of the ShortcutsProvider for autocomplete results.
 const char kEnableShortcutsProvider[]       = "enable-shortcuts-provider";
 
 // On platforms that support it, enable smooth scroll animation.
 const char kEnableSmoothScrolling[]         = "enable-smooth-scrolling";
 
 // Enables TLS cached info extension.
 const char kEnableSSLCachedInfo[]  = "enable-ssl-cached-info";
 
+// Enable syncing extension settings.
+const char kEnableSyncExtensionSettings[]   = "enable-sync-extension-settings";
+
 // Enable OAuth sign-in for sync.
 const char kEnableSyncOAuth[]               = "enable-sync-oauth";
 
 // Enable syncing browser sessions.
 const char kEnableSyncSessions[]            = "enable-sync-sessions";
 
 // Enables context menu for selecting groups of tabs.
 const char kEnableTabGroupsContextMenu[]     = "enable-tab-groups-context-menu";
 
 // Enable the "synced bookmarks" folder.
@@ skipping 712 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead,
 // please put them in alphabetical order above, or in order inside the
 // appropriate ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches