Add more missing closing namespace comments.

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

 // Copyright 2015 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/HTMLTableRowElement.h"
 
 #include "core/dom/Document.h"
 #include "core/html/HTMLParagraphElement.h"
 #include "core/html/HTMLTableElement.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 37 matching lines @@
         HTMLParagraphElement::create(*document);
     RefPtrWillBeRawPtr<HTMLTableRowElement> row =
         HTMLTableRowElement::create(*document);
     table->appendChild(paragraph);
     paragraph->appendChild(row);
     EXPECT_EQ(-1, row->rowIndex())
         << "rows in a table, but within an unrelated element, should have "
         << "row index -1";
 }
 
-}
+} // namespace