cc: Fix style for comments at the end of namespaces

cc/overdraw_metrics.cc

 // Copyright 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.
 
 #include "config.h"
 
 #include "cc/overdraw_metrics.h"
 
 #include "base/debug/trace_event.h"
 #include "base/metrics/histogram.h"
@@ skipping 165 matching lines @@
         }
         {
             // This must be in a different scope than the TRACE_EVENTs above.
             TRACE_EVENT2("cc", "OverdrawPaintMetrics", "ContentsTextureBytes", m_contentsTextureUseBytes, "RenderSurfaceTextureBytes", m_renderSurfaceTextureUseBytes);
         }
         break;
     }
     }
 }
 
-} // namespace cc
+}  // namespace cc