Add more missing closing namespace comments.

third_party/WebKit/Source/core/html/HTMLRubyElement.cpp

 // 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.
 
 #include "core/html/HTMLRubyElement.h"
 
 #include "core/HTMLNames.h"
 #include "core/layout/LayoutRuby.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 inline HTMLRubyElement::HTMLRubyElement(Document& document)
     : HTMLElement(rubyTag, document)
 {
 }
 
 DEFINE_NODE_FACTORY(HTMLRubyElement)
 
 LayoutObject* HTMLRubyElement::createLayoutObject(const ComputedStyle& style)
 {
     if (style.display() == INLINE)
         return new LayoutRubyAsInline(this);
     if (style.display() == BLOCK)
         return new LayoutRubyAsBlock(this);
     return LayoutObject::createObject(this, style);
 }
 
-}
+} // namespace blink