Remove wtf_ceil.

Source/platform/Decimal.cpp

 /*
  * 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 599 matching lines @@
     alignedOperands.rhsCoefficient = rhsCoefficient;
     return alignedOperands;
 }
 
 static bool isMultiplePowersOfTen(uint64_t coefficient, int n)
 {
     return !coefficient || !(coefficient % scaleUp(1, n));
 }
 
 // Round toward positive infinity.
-// Note: Mac ports defines ceil(x) as wtf_ceil(x), so we can't use name "ceil" here.
-Decimal Decimal::ceiling() const
+Decimal Decimal::ceil() const
 {
     if (isSpecial())
         return *this;
 
     if (exponent() >= 0)
         return *this;
 
     uint64_t result = m_data.coefficient();
     const int numberOfDigits = countDigits(result);
     const int numberOfDropDigits = -exponent();
@@ skipping 256 matching lines @@
 }
 
 Decimal Decimal::nan()
 {
     return Decimal(EncodedData(Positive, EncodedData::ClassNaN));
 }
 
 Decimal Decimal::remainder(const Decimal& rhs) const
 {
     const Decimal quotient = *this / rhs;
-    return quotient.isSpecial() ? quotient : *this - (quotient.isNegative() ? quotient.ceiling() : quotient.floor()) * rhs;
+    return quotient.isSpecial() ? quotient : *this - (quotient.isNegative() ? quotient.ceil() : quotient.floor()) * rhs;
 }
 
 Decimal Decimal::round() const
 {
     if (isSpecial())
         return *this;
 
     if (exponent() >= 0)
         return *this;
 
@@ skipping 108 matching lines @@
     }
     return builder.toString();
 }
 
 Decimal Decimal::zero(Sign sign)
 {
     return Decimal(EncodedData(sign, EncodedData::ClassZero));
 }
 
 } // namespace blink