Reapply the non-MathExtras parts of

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 197 matching lines @@
 }
 
 inline float operator*(const FloatPoint& a, const FloatPoint& b)
 {
     // dot product
     return a.dot(b);
 }
 
 inline IntPoint roundedIntPoint(const FloatPoint& p)
 {
-    return IntPoint(clampToInteger(roundf(p.x())), clampToInteger(roundf(p.y())));
+    return IntPoint(clampTo<int>(roundf(p.x())), clampTo<int>(roundf(p.y())));
 }
 
 inline IntPoint flooredIntPoint(const FloatPoint& p)
 {
-    return IntPoint(clampToInteger(floorf(p.x())), clampToInteger(floorf(p.y())));
+    return IntPoint(clampTo<int>(floorf(p.x())), clampTo<int>(floorf(p.y())));
 }
 
 inline IntPoint ceiledIntPoint(const FloatPoint& p)
 {
-    return IntPoint(clampToInteger(ceilf(p.x())), clampToInteger(ceilf(p.y())));
+    return IntPoint(clampTo<int>(ceilf(p.x())), clampTo<int>(ceilf(p.y())));
 }
 
 inline IntSize flooredIntSize(const FloatPoint& p)
 {
-    return IntSize(clampToInteger(floorf(p.x())), clampToInteger(floorf(p.y())));
+    return IntSize(clampTo<int>(floorf(p.x())), clampTo<int>(floorf(p.y())));
 }
 
 inline FloatSize toFloatSize(const FloatPoint& a)
 {
     return FloatSize(a.x(), a.y());
 }
 
 PLATFORM_EXPORT float findSlope(const FloatPoint& p1, const FloatPoint& p2, float& c);
 
 // 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);
 
 }
 
 #endif