Sync: Turn on full history sync by default.

chrome/browser/sync/profile_sync_service.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/browser/sync/profile_sync_service.h"
 
 #include <cstddef>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 966 matching lines @@
     }
   }
 
   // Now enable any non-datatype features.
   if (experiments.keystore_encryption) {
     about_flags::SetExperimentEnabled(g_browser_process->local_state(),
                                       syncer::kKeystoreEncryptionFlag,
                                       true);
   }
 
-  if (experiments.full_history_sync) {
-    about_flags::SetExperimentEnabled(g_browser_process->local_state(),
-                                      syncer::kFullHistorySyncFlag,
-                                      true);
-  }
-
   if (experiments.favicon_sync) {
     about_flags::SetExperimentEnabled(g_browser_process->local_state(),
                                       syncer::kFaviconSyncFlag,
                                       true);
   }
 
   current_experiments_ = experiments;
 }
 
 void ProfileSyncService::UpdateAuthErrorState(const AuthError& error) {
@@ skipping 1061 matching lines @@
   // See http://stackoverflow.com/questions/6224121/is-new-this-myclass-undefined-behaviour-after-directly-calling-the-destru.
   ProfileSyncService* old_this = this;
   this->~ProfileSyncService();
   new(old_this) ProfileSyncService(
       new ProfileSyncComponentsFactoryImpl(profile,
                                            CommandLine::ForCurrentProcess()),
       profile,
       signin,
       behavior);
 }