Reapply the non-MathExtras parts of

Source/platform/LayoutUnit.h

 /*
  * Copyright (c) 2012, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 56 matching lines @@
     LayoutUnit(unsigned short value) { setValue(value); }
     LayoutUnit(unsigned value) { setValue(value); }
     LayoutUnit(unsigned long value) { m_value = clampTo<int>(value * kFixedPointDenominator); }
     LayoutUnit(unsigned long long value) { m_value = clampTo<int>(value * kFixedPointDenominator); }
     LayoutUnit(float value) { m_value = clampTo<int>(value * kFixedPointDenominator); }
     LayoutUnit(double value) { m_value = clampTo<int>(value * kFixedPointDenominator); }
 
     static LayoutUnit fromFloatCeil(float value)
     {
         LayoutUnit v;
-        v.m_value = clampToInteger(ceilf(value * kFixedPointDenominator));
+        v.m_value = clampTo<int>(ceilf(value * kFixedPointDenominator));
         return v;
     }
 
     static LayoutUnit fromFloatFloor(float value)
     {
         LayoutUnit v;
-        v.m_value = clampToInteger(floorf(value * kFixedPointDenominator));
+        v.m_value = clampTo<int>(floorf(value * kFixedPointDenominator));
         return v;
     }
 
     static LayoutUnit fromFloatRound(float value)
     {
         if (value >= 0)
             return clamp(value + epsilon() / 2.0f);
         return clamp(value - epsilon() / 2.0f);
     }
 
@@ skipping 698 matching lines @@
     if (value >= max)
         return max;
     if (value <= min)
         return min;
     return value;
 }
 
 } // namespace blink
 
 #endif // LayoutUnit_h