Add a preference to clear Flash LSO data in the Clear Browsing Data dialog.

chrome/browser/sync/glue/synchronized_preferences.h

 // Copyright (c) 2010 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.
 
 // Defines a list of the preferences that the
 // PreferencesChangeProcessor should process changes for.
 
 #ifndef CHROME_BROWSER_SYNC_GLUE_SYNCHRONIZED_PREFERENCES_H_
 #define CHROME_BROWSER_SYNC_GLUE_SYNCHRONIZED_PREFERENCES_H_
 #pragma once
@@ skipping 38 matching lines @@
   // Options dialog: under the hood -> Content Settings -> Notifications.
   prefs::kDesktopNotificationDefaultContentSetting,
 
   // Options dialog: Under the hood -> Clear browsing data.
   //  All working but no live update.
   prefs::kDeleteBrowsingHistory,
   prefs::kDeleteDownloadHistory,
   prefs::kDeleteCache,
   prefs::kDeleteCookies,
   prefs::kDeletePasswords,
+  prefs::kDeleteLSOData,
   prefs::kDeleteFormData,
   prefs::kDeleteTimePeriod,
 
   // Options dialog: Under the hood -> Change proxy settings.
   //  Uses native OS dialog, not synced.
 
   // Options dialog: Under the hood -> Change font and language settings.
   //   Serif, San Serif, Fixed font settings not synced.
   prefs::kDefaultCharset,
   // There is no dialog to modify the kAcceptLanguages list on OSX, so
@@ skipping 116 matching lines @@
 
   // Whether to show mobile plan notifications.
   //   Settings -> Internet -> Mobile plan details
   prefs::kShowPlanNotifications,
 #endif
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNCHRONIZED_PREFERENCES_H_