Add more missing closing namespace comments.

third_party/WebKit/Source/platform/geometry/FloatSize.cpp

 /*
  * Copyright (C) 2003, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2005 Nokia.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 42 matching lines @@
 bool FloatSize::isExpressibleAsIntSize() const
 {
     return isWithinIntRange(m_width) && isWithinIntRange(m_height);
 }
 
 FloatSize FloatSize::narrowPrecision(double width, double height)
 {
     return FloatSize(narrowPrecisionToFloat(width), narrowPrecisionToFloat(height));
 }
 
-}
+} // namespace blink