Add more missing closing namespace comments.

third_party/WebKit/Source/core/html/HTMLPictureElement.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/HTMLPictureElement.h"
 
 #include "core/HTMLNames.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/frame/UseCounter.h"
 #include "core/html/HTMLImageElement.h"
@@ skipping 16 matching lines @@
         imageElement->selectSourceURL(ImageLoader::UpdateNormal);
     }
 }
 
 Node::InsertionNotificationRequest HTMLPictureElement::insertedInto(ContainerNode* insertionPoint)
 {
     UseCounter::count(document(), UseCounter::Picture);
     return HTMLElement::insertedInto(insertionPoint);
 }
 
-} // namespace
+} // namespace blink