Sync: Turn on full history sync by default.

chrome/common/chrome_switches.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.
 
 // Defines all the command-line switches used by Chrome.
 
 #ifndef CHROME_COMMON_CHROME_SWITCHES_H_
 #define CHROME_COMMON_CHROME_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 103 matching lines @@
 extern const char kDisableScriptedPrintThrottling[];
 extern const char kDisableSync[];
 extern const char kDisableSyncAppSettings[];
 extern const char kDisableSyncApps[];
 extern const char kDisableSyncAutofill[];
 extern const char kDisableSyncAutofillProfile[];
 extern const char kDisableSyncBookmarks[];
 extern const char kDisableSyncDictionary[];
 extern const char kDisableSyncExtensionSettings[];
 extern const char kDisableSyncExtensions[];
-extern const char kDisableSyncHistoryDeleteDirectives[];
 extern const char kDisableSyncPasswords[];
 extern const char kDisableSyncPreferences[];
 extern const char kDisableSyncPriorityPreferences[];
 extern const char kDisableSyncSearchEngines[];
 extern const char kDisableSyncThemes[];
 extern const char kDisableSyncTypedUrls[];
 extern const char kDisableTranslate[];
 extern const char kDisableTLSChannelID[];
 extern const char kDisableWebResources[];
 extern const char kDisableZeroBrowsersOpenForTests[];
@@ skipping 348 matching lines @@
 #else
 extern const char kEnablePrintPreview[];
 #endif
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CHROME_COMMON_CHROME_SWITCHES_H_