Add more missing closing namespace comments.

third_party/WebKit/Source/core/layout/LayoutTableCellTest.cpp

 /*
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 102 matching lines @@
 TEST_F(LayoutTableCellTest, BackgroundIsKnownToBeOpaqueWithLayerAndCollapsedBorder)
 {
     setBodyInnerHTML("<table style='border-collapse: collapse'>"
         "<td style='will-change: transform; background-color: blue'>Cell></td>"
         "</table>");
 
     LayoutTableCell* cell = toLayoutTableCell(document().body()->firstChild()->firstChild()->firstChild()->firstChild()->layoutObject());
     EXPECT_FALSE(cell->backgroundIsKnownToBeOpaqueInRect(LayoutRect(0, 0, 1, 1)));
 }
 
-}
+} // namespace
 
 } // namespace blink