Add GROUP_FILE ModelSafeGroup

chrome/browser/sync/glue/database_model_worker.cc

-// Copyright (c) 2011 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/database_model_worker.h"
-
-#include "base/synchronization/waitable_event.h"
-#include "content/browser/browser_thread.h"
-
-using base::WaitableEvent;
-
-namespace browser_sync {
-
-void DatabaseModelWorker::DoWorkAndWaitUntilDone(Callback0::Type* work) {
-  if (BrowserThread::CurrentlyOn(BrowserThread::DB)) {
-    DLOG(WARNING) << "DoWorkAndWaitUntilDone called from the DB thread.";
-    work->Run();
-    return;
-  }
-  WaitableEvent done(false, false);
-  if (!BrowserThread::PostTask(BrowserThread::DB, FROM_HERE,
-      NewRunnableMethod(this, &DatabaseModelWorker::CallDoWorkAndSignalTask,
-                        work, &done))) {
-    NOTREACHED() << "Failed to post task to the db thread.";
-    return;
-  }
-  done.Wait();
-}
-
-void DatabaseModelWorker::CallDoWorkAndSignalTask(Callback0::Type* work,
-                                                  WaitableEvent* done) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
-  work->Run();
-  done->Signal();
-}
-
-ModelSafeGroup DatabaseModelWorker::GetModelSafeGroup() {
-  return GROUP_DB;
-}
-
-}  // namespace browser_sync