Move MessageLoop to base namespace.

chrome/browser/sync/glue/ui_model_worker.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.
 
 #ifndef CHROME_BROWSER_SYNC_GLUE_UI_MODEL_WORKER_H_
 #define CHROME_BROWSER_SYNC_GLUE_UI_MODEL_WORKER_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/synchronization/condition_variable.h"
 #include "base/synchronization/lock.h"
 #include "sync/internal_api/public/engine/model_safe_worker.h"
 #include "sync/internal_api/public/util/unrecoverable_error_info.h"
 
-class MessageLoop;
-
 namespace browser_sync {
 
 // A syncer::ModelSafeWorker for UI models (e.g. bookmarks) that
 // accepts work requests from the syncapi that need to be fulfilled
 // from the MessageLoop home to the native model.
 //
 // Lifetime note: Instances of this class will generally be owned by the
 // SyncerThread. When the SyncerThread _object_ is destroyed, the
 // UIModelWorker will be destroyed. The SyncerThread object is destroyed
 // after the actual syncer pthread has exited.
@@ skipping 68 matching lines @@
   // SyncerThread has terminated. We only care about (1) when we are in Stop(),
   // because we have to manually Run() the task.
   base::ConditionVariable syncapi_event_;
 
   DISALLOW_COPY_AND_ASSIGN(UIModelWorker);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_UI_MODEL_WORKER_H_