cc: Fix style for comments at the end of namespaces

cc/layer_tree_host_unittest.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/layer_tree_host.h"
 
 #include "base/synchronization/lock.h"
 #include "cc/content_layer.h"
@@ skipping 3252 matching lines @@
 private:
     int m_numCommitsDeferred;
     int m_numCompleteCommits;
 };
 
 TEST_F(LayerTreeHostTestDeferCommits, runMultiThread)
 {
     runTest(true);
 }
 
-} // namespace
+}  // anonymous namespace