Make SVGLength wrap a CSSPrimitiveValue.

third_party/WebKit/Source/core/css/CSSToLengthConversionData.cpp

 /*
  * Copyright (C) 2013 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 104 matching lines @@
     return m_fontSizes.rem();
 }
 
 double CSSToLengthConversionData::zoomedComputedPixels(double value, CSSPrimitiveValue::UnitType type) const
 {
     // The logic in this function is duplicated in MediaValues::computeLength()
     // because MediaValues::computeLength() needs nearly identical logic, but we haven't found a way to make
     // zoomedComputedPixels() more generic (to solve both cases) without hurting performance.
     switch (type) {
     case CSSPrimitiveValue::UnitType::Pixels:
+    case CSSPrimitiveValue::UnitType::UserUnits:
         return value * zoom();
 
     case CSSPrimitiveValue::UnitType::Centimeters:
         return value * cssPixelsPerCentimeter * zoom();
 
     case CSSPrimitiveValue::UnitType::Millimeters:
         return value * cssPixelsPerMillimeter * zoom();
 
     case CSSPrimitiveValue::UnitType::Inches:
         return value * cssPixelsPerInch * zoom();
@@ skipping 32 matching lines @@
     case CSSPrimitiveValue::UnitType::Chs:
         return value * chFontSize();
 
     default:
         ASSERT_NOT_REACHED();
         return 0;
     }
 }
 
 } // namespace blink