Use Length for baselineShiftValue in SVGLayoutStyle

Source/core/css/resolver/AnimatedStyleBuilder.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 275 matching lines @@
     case CSSPropertyBackgroundPositionX:
         setOnFillLayers<CSSPropertyBackgroundPositionX>(style->accessBackgroundLayers(), value, state);
         return;
     case CSSPropertyBackgroundPositionY:
         setOnFillLayers<CSSPropertyBackgroundPositionY>(style->accessBackgroundLayers(), value, state);
         return;
     case CSSPropertyBackgroundSize:
         setOnFillLayers<CSSPropertyBackgroundSize>(style->accessBackgroundLayers(), value, state);
         return;
     case CSSPropertyBaselineShift:
-        style->setBaselineShiftValue(toAnimatableSVGLength(value)->toSVGLength());
+        style->setBaselineShiftValue(animatableValueToLength(value, state));
         return;
     case CSSPropertyBorderBottomColor:
         style->setBorderBottomColor(toAnimatableColor(value)->color());
         style->setVisitedLinkBorderBottomColor(toAnimatableColor(value)->visitedLinkColor());
         return;
     case CSSPropertyBorderBottomLeftRadius:
         style->setBorderBottomLeftRadius(animatableValueToLengthSize(value, state, ValueRangeNonNegative));
         return;
     case CSSPropertyBorderBottomRightRadius:
         style->setBorderBottomRightRadius(animatableValueToLengthSize(value, state, ValueRangeNonNegative));
@@ skipping 324 matching lines @@
     case CSSPropertyY:
         style->setY(animatableValueToLength(value, state));
         return;
 
     default:
         ASSERT_NOT_REACHED();
     }
 }
 
 } // namespace blink