Revert 56423 - Added classes to enable session sync functionality....

chrome/common/pref_names.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.
 
 // 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 300 matching lines @@
 extern const char kNTPMostVisitedURLsBlacklist[];
 extern const char kNTPMostVisitedPinnedURLs[];
 extern const char kNTPTipsCache[];
 extern const char kNTPTipsCacheUpdate[];
 extern const char kNTPTipsServer[];
 extern const char kNTPShownSections[];
 extern const char kNTPPrefVersion[];
 
 extern const char kDevToolsOpenDocked[];
 extern const char kDevToolsSplitLocation[];
-extern const char kSyncSessions[];
 
 extern const char kSyncLastSyncedTime[];
 extern const char kSyncHasSetupCompleted[];
 extern const char kKeepEverythingSynced[];
 extern const char kSyncBookmarks[];
 extern const char kSyncPasswords[];
 extern const char kSyncPreferences[];
 extern const char kSyncApps[];
 extern const char kSyncAutofill[];
 extern const char kSyncThemes[];
@@ skipping 23 matching lines @@
 extern const char kProxyAutoDetect[];
 extern const char kProxyServer[];
 extern const char kProxyPacUrl[];
 extern const char kProxyBypassList[];
 
 extern const char kRegisteredBackgroundContents[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_