Add more missing closing namespace comments.

third_party/WebKit/Source/core/animation/StringKeyframe.h

 // Copyright 2014 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.
 
 #ifndef StringKeyframe_h
 #define StringKeyframe_h
 
 #include "core/animation/Keyframe.h"
 #include "core/css/StylePropertySet.h"
 
@@ skipping 105 matching lines @@
     HashMap<const QualifiedName*, String> m_svgAttributeMap;
 };
 
 using CSSPropertySpecificKeyframe = StringKeyframe::CSSPropertySpecificKeyframe;
 using SVGPropertySpecificKeyframe = StringKeyframe::SVGPropertySpecificKeyframe;
 
 DEFINE_TYPE_CASTS(StringKeyframe, Keyframe, value, value->isStringKeyframe(), value.isStringKeyframe());
 DEFINE_TYPE_CASTS(CSSPropertySpecificKeyframe, Keyframe::PropertySpecificKeyframe, value, value->isCSSPropertySpecificKeyframe(), value.isCSSPropertySpecificKeyframe());
 DEFINE_TYPE_CASTS(SVGPropertySpecificKeyframe, Keyframe::PropertySpecificKeyframe, value, value->isSVGPropertySpecificKeyframe(), value.isSVGPropertySpecificKeyframe());
 
-}
+} // namespace blink
 
 #endif