Make SVGLengthMode an enum class

Source/core/svg/SVGAnimatedTypeAnimator.cpp

 /*
  * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved.
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 86 matching lines @@
 
     switch (m_type) {
     case AnimatedColor:
         return SVGColorProperty::create(value.isEmpty() ? StyleColor::currentColor() : CSSParser::colorFromRGBColorString(value));
     case AnimatedNumber: {
         RefPtrWillBeRawPtr<SVGNumber> property = SVGNumber::create();
         property->setValueAsString(value, IGNORE_EXCEPTION);
         return property.release();
     }
     case AnimatedLength: {
-        RefPtrWillBeRawPtr<SVGLength> property = SVGLength::create(LengthModeOther);
+        RefPtrWillBeRawPtr<SVGLength> property = SVGLength::create();
         property->setValueAsString(value, IGNORE_EXCEPTION);
         return property.release();
     }
     case AnimatedLengthList: {
-        RefPtrWillBeRawPtr<SVGLengthList> property = SVGLengthList::create(LengthModeOther);
+        RefPtrWillBeRawPtr<SVGLengthList> property = SVGLengthList::create();
         property->setValueAsString(value, IGNORE_EXCEPTION);
         return property.release();
     }
     case AnimatedString: {
         RefPtrWillBeRawPtr<SVGString> property = SVGString::create();
         property->setValueAsString(value, IGNORE_EXCEPTION);
         return property.release();
     }
 
     // These types don't appear in the table in SVGElement::animatedPropertyTypeForCSSAttribute() and thus don't need support.
@@ skipping 140 matching lines @@
 }
 
 DEFINE_TRACE(SVGAnimatedTypeAnimator)
 {
     visitor->trace(m_animationElement);
     visitor->trace(m_contextElement);
     visitor->trace(m_animatedProperty);
 }
 
 }