[Sync] Initial support for encrypting any datatype (no UI hookup yet).

chrome/browser/sync/glue/password_change_processor.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 "chrome/browser/sync/glue/password_change_processor.h"
 
 #include <string>
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 132 matching lines @@
   PasswordModelAssociator::PasswordVector updated_passwords;
   PasswordModelAssociator::PasswordVector deleted_passwords;
 
   for (int i = 0; i < change_count; ++i) {
     if (sync_api::SyncManager::ChangeRecord::ACTION_DELETE ==
         changes[i].action) {
       DCHECK(changes[i].specifics.HasExtension(sync_pb::password))
           << "Password specifics data not present on delete!";
       DCHECK(changes[i].extra.get());
       sync_api::SyncManager::ExtraPasswordChangeRecordData* extra =
-          static_cast<sync_api::SyncManager::ExtraPasswordChangeRecordData*>(
-              changes[i].extra.get());
+          changes[i].extra.get();
       const sync_pb::PasswordSpecificsData& password = extra->unencrypted();
       webkit_glue::PasswordForm form;
       PasswordModelAssociator::CopyPassword(password, &form);
       deleted_passwords.push_back(form);
       model_associator_->Disassociate(changes[i].id);
       continue;
     }
 
     sync_api::ReadNode sync_node(trans);
     if (!sync_node.InitByIdLookup(changes[i].id)) {
@@ skipping 51 matching lines @@
 }
 
 void PasswordChangeProcessor::StopObserving() {
   DCHECK(expected_loop_ == MessageLoop::current());
   notification_registrar_.Remove(this,
                                  NotificationType::LOGINS_CHANGED,
                                  Source<PasswordStore>(password_store_));
 }
 
 }  // namespace browser_sync