[svg2] Make SVGLength wrap a CSSPrimitiveValue

Source/core/svg/SVGLengthTearOff.h

Index: Source/core/svg/SVGLengthTearOff.h
diff --git a/Source/core/svg/SVGLengthTearOff.h b/Source/core/svg/SVGLengthTearOff.h
index 8714f7b55585c9583b62679225030f03d9f37db7..a94130dea3b5e0ed64fba138b2479ce4dcfa6e13 100644
--- a/Source/core/svg/SVGLengthTearOff.h
+++ b/Source/core/svg/SVGLengthTearOff.h
@@ -32,9 +32,11 @@
 #define SVGLengthTearOff_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
+#include "core/css/CSSPrimitiveValue.h"
 #include "core/svg/SVGLength.h"
 #include "core/svg/properties/SVGPropertyTearOff.h"
 
+
 namespace blink {
 
 class SVGLengthTearOff final : public SVGPropertyTearOff<SVGLength>, public ScriptWrappable {
@@ -71,7 +73,7 @@ public:
     void newValueSpecifiedUnits(unsigned short unitType, float valueInSpecifiedUnits, ExceptionState&);
     void convertToSpecifiedUnits(unsigned short unitType, ExceptionState&);
 
-    bool hasExposedLengthUnit() { return target()->unitType() <= LengthTypePC; }
+    bool hasExposedLengthUnit() { return target()->primitiveType() <= CSSPrimitiveValue::CSS_PC; }
 
 private:
     SVGLengthTearOff(PassRefPtrWillBeRawPtr<SVGLength>, SVGElement* contextElement, PropertyIsAnimValType, const QualifiedName& attributeName = QualifiedName::null());