Add more missing closing namespace comments.

third_party/WebKit/Source/platform/geometry/FloatPoint.h

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2005 Nokia.  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 259 matching lines @@
     return FloatSize(a.x(), a.y());
 }
 
 // Find point where lines through the two pairs of points intersect. Returns false if the lines don't intersect.
 PLATFORM_EXPORT bool findIntersection(const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& d1, const FloatPoint& d2, FloatPoint& intersection);
 
 // Redeclared here to avoid ODR issues.
 // See platform/testing/GeometryPrinters.h.
 void PrintTo(const FloatPoint&, std::ostream*);
 
-}
+} // namespace blink
 
 #endif