Allow Length::nonNanCalculatedValue to take a LayoutUnit

Source/platform/Length.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller ( mueller@kde.org )
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 214 matching lines @@
     ASSERT(isCalculated());
     calculationValue().ref();
 }
 
 void Length::decrementCalculatedRef() const
 {
     ASSERT(isCalculated());
     calcHandles().decrementRef(calculationHandle());
 }
 
-float Length::nonNanCalculatedValue(int maxValue) const
+float Length::nonNanCalculatedValue(float maxValue) const
 {
     ASSERT(isCalculated());
     float result = calculationValue().evaluate(maxValue);
     if (std::isnan(result))
         return 0;
     return result;
 }
 
 bool Length::isCalculatedEqual(const Length& o) const
 {
     return isCalculated() && (&calculationValue() == &o.calculationValue() || calculationValue() == o.calculationValue());
 }
 
 struct SameSizeAsLength {
     int32_t value;
     int32_t metaData;
 };
 static_assert(sizeof(Length) == sizeof(SameSizeAsLength), "length should stay small");
 
 } // namespace blink