cc: Fix style for comments at the end of namespaces

cc/scoped_thread_proxy.cc

 // Copyright 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 "config.h"
 
 #include "cc/scoped_thread_proxy.h"
 
 #include "base/bind.h"
 
@@ skipping 25 matching lines @@
 {
     // If our shutdown flag is set, it's possible that m_targetThread has already been destroyed so don't
     // touch it.
     if (m_shutdown) {
         return;
     }
     DCHECK(m_targetThread->belongsToCurrentThread());
     cb.Run();
 }
 
-}
+}  // namespace cc