Support keywords in LengthStyleInterpolation

Source/core/animation/StringKeyframe.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/animation/StringKeyframe.h"
 
 #include "core/animation/ColorStyleInterpolation.h"
 #include "core/animation/CompositorAnimations.h"
 #include "core/animation/ConstantStyleInterpolation.h"
@@ skipping 172 matching lines @@
     case CSSPropertyMarginBottom:
     case CSSPropertyMarginLeft:
     case CSSPropertyMarginRight:
     case CSSPropertyMarginTop:
     case CSSPropertyOutlineOffset:
     case CSSPropertyRight:
     case CSSPropertyTop:
     case CSSPropertyVerticalAlign:
     case CSSPropertyWordSpacing:
     case CSSPropertyWebkitColumnRuleWidth:
-        if (LengthStyleInterpolation::canCreateFrom(*fromCSSValue) && LengthStyleInterpolation::canCreateFrom(*toCSSValue))
+        if (LengthStyleInterpolation::canCreateFrom(*fromCSSValue, property) && LengthStyleInterpolation::canCreateFrom(*toCSSValue, property))
             return LengthStyleInterpolation::create(*fromCSSValue, *toCSSValue, property, range);
 
-        // FIXME: Handle keywords e.g. 'none'.
-        if (property == CSSPropertyPerspective)
-            fallBackToLegacy = true;
         // FIXME: Handle keywords e.g. 'smaller', 'larger'.
         if (property == CSSPropertyFontSize)
             fallBackToLegacy = true;
 
-        // FIXME: Handle keywords e.g. 'normal'
-        if (property == CSSPropertyLetterSpacing)
-            fallBackToLegacy = true;
-
-        // FIXME: Handle keywords e.g. 'thick'
-        if (property == CSSPropertyOutlineWidth || property == CSSPropertyWebkitColumnRuleWidth)
-            fallBackToLegacy = true;
         break;
     case CSSPropertyOrphans:
     case CSSPropertyWidows:
     case CSSPropertyZIndex:
     case CSSPropertyWebkitColumnCount:
     case CSSPropertyShapeImageThreshold:
     case CSSPropertyFillOpacity:
     case CSSPropertyFloodOpacity:
     case CSSPropertyOpacity:
     case CSSPropertyStopOpacity:
@@ skipping 183 matching lines @@
 }
 
 void StringKeyframe::PropertySpecificKeyframe::trace(Visitor* visitor)
 {
     visitor->trace(m_value);
     visitor->trace(m_animatableValueCache);
     Keyframe::PropertySpecificKeyframe::trace(visitor);
 }
 
 }