Turn password sync on by default.

chrome/browser/sync/glue/sync_backend_host.cc

 // 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.
 
 #include "build/build_config.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 112 matching lines @@
   // be in the routing_info map.  We set them to group passive, meaning that
   // updates will be applied, but not dispatched to the UI thread yet.
   for (syncable::ModelTypeSet::const_iterator it = types.begin();
       it != types.end(); ++it) {
     registrar_.routing_info[(*it)] = GROUP_PASSIVE;
   }
 
   // TODO(tim): Remove this special case once NIGORI is populated by
   // default.  We piggy back off of the passwords flag for now to not
   // require both encryption and passwords flags.
-  bool enable_encryption = CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableSyncPasswords) || types.count(syncable::PASSWORDS);
+  bool enable_encryption = !CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kDisableSyncPasswords) || types.count(syncable::PASSWORDS);
   if (enable_encryption)
     registrar_.routing_info[syncable::NIGORI] = GROUP_PASSIVE;
 
   InitCore(Core::DoInitializeOptions(
       sync_service_url,
       MakeHttpBridgeFactory(baseline_context_getter),
       credentials,
       delete_sync_data_folder,
       notifier_options,
       RestoreEncryptionBootstrapToken(),
@@ skipping 748 matching lines @@
 }
 
 void SyncBackendHost::Core::DeleteSyncDataFolder() {
   if (file_util::DirectoryExists(host_->sync_data_folder_path())) {
     if (!file_util::Delete(host_->sync_data_folder_path(), true))
       LOG(DFATAL) << "Could not delete the Sync Data folder.";
   }
 }
 
 }  // namespace browser_sync