Add more missing closing namespace comments.

third_party/WebKit/Source/platform/PlatformTouchPoint.h

 /*
     Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 43 matching lines @@
 protected:
     WebPointerProperties m_pointerProperties;
 
     State m_state;
     FloatPoint m_screenPos;
     FloatPoint m_pos;
     FloatSize m_radius;
     float m_rotationAngle;
 };
 
-}
+} // namespace blink
 
 #endif // PlatformTouchPoint_h