Reapply the non-MathExtras parts of

Source/platform/geometry/FloatSize.h

 /*
  * Copyright (C) 2003, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2005 Nokia.  All rights reserved.
  *               2008 Eric Seidel <eric@webkit.org>
  *
  * 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.
@@ skipping 158 matching lines @@
     return a.width() == b.width() && a.height() == b.height();
 }
 
 inline bool operator!=(const FloatSize& a, const FloatSize& b)
 {
     return a.width() != b.width() || a.height() != b.height();
 }
 
 inline IntSize roundedIntSize(const FloatSize& p)
 {
-    return IntSize(clampToInteger(roundf(p.width())), clampToInteger(roundf(p.height())));
+    return IntSize(clampTo<int>(roundf(p.width())), clampTo<int>(roundf(p.height())));
 }
 
 inline IntSize flooredIntSize(const FloatSize& p)
 {
-    return IntSize(clampToInteger(floorf(p.width())), clampToInteger(floorf(p.height())));
+    return IntSize(clampTo<int>(floorf(p.width())), clampTo<int>(floorf(p.height())));
 }
 
 inline IntSize expandedIntSize(const FloatSize& p)
 {
-    return IntSize(clampToInteger(ceilf(p.width())), clampToInteger(ceilf(p.height())));
+    return IntSize(clampTo<int>(ceilf(p.width())), clampTo<int>(ceilf(p.height())));
 }
 
 inline IntPoint flooredIntPoint(const FloatSize& p)
 {
-    return IntPoint(clampToInteger(floorf(p.width())), clampToInteger(floorf(p.height())));
+    return IntPoint(clampTo<int>(floorf(p.width())), clampTo<int>(floorf(p.height())));
 }
 
 } // namespace blink
 
 #endif // FloatSize_h