Add more missing closing namespace comments.

third_party/WebKit/Source/core/animation/animatable/AnimatableLengthBoxAndBool.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 57 matching lines @@
         AnimatableValue::interpolate(box(), lengthBoxAndBool->box(), fraction),
         flag());
 }
 
 bool AnimatableLengthBoxAndBool::equalTo(const AnimatableValue* value) const
 {
     const AnimatableLengthBoxAndBool* lengthBox = toAnimatableLengthBoxAndBool(value);
     return box()->equals(lengthBox->box()) && flag() == lengthBox->flag();
 }
 
-}
+} // namespace blink