Add more missing closing namespace comments.

third_party/WebKit/Source/core/paint/SVGMaskPainter.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/paint/SVGMaskPainter.h"
 
 #include "core/layout/svg/LayoutSVGResourceMasker.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
 #include "core/paint/PaintInfo.h"
 #include "core/paint/TransformRecorder.h"
@@ skipping 43 matching lines @@
     if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutObject, DisplayItem::SVGMask, LayoutPoint()))
         return;
 
     LayoutObjectDrawingRecorder drawingRecorder(context, layoutObject, DisplayItem::SVGMask, targetPaintInvalidationRect, LayoutPoint());
     context.save();
     context.concatCTM(contentTransformation);
     context.drawPicture(maskContentPicture.get());
     context.restore();
 }
 
-}
+} // namespace blink