Build animated font properties through FontBuilder.

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 241 matching lines @@
         FontWeight700,
         FontWeight800,
         FontWeight900
     };
 
     index = clampTo<int>(index, 0, WTF_ARRAY_LENGTH(weights) - 1);
 
     return weights[index];
 }
 
+FontDescription::Size animatableValueToFontSize(const AnimatableValue* value)
+{
+    float size = clampTo<float>(toAnimatableDouble(value)->toDouble(), 0);
+    return FontDescription::Size(0, size, true);
+}
+
 } // namespace
 
 // FIXME: Generate this function.
 void AnimatedStyleBuilder::applyProperty(CSSPropertyID property, StyleResolverState& state, const AnimatableValue* value)
 {
     ASSERT(CSSPropertyMetadata::isAnimatableProperty(property));
     if (value->isUnknown()) {
         StyleBuilder::applyProperty(property, state, toAnimatableUnknown(value)->toCSSValue().get());
         return;
     }
@@ skipping 103 matching lines @@
     case CSSPropertyFlexBasis:
         style->setFlexBasis(animatableValueToLength(value, state, ValueRangeNonNegative));
         return;
     case CSSPropertyFloodColor:
         style->setFloodColor(toAnimatableColor(value)->color());
         return;
     case CSSPropertyFloodOpacity:
         style->setFloodOpacity(clampTo<float>(toAnimatableDouble(value)->toDouble(), 0, 1));
         return;
     case CSSPropertyFontSize:
-        style->setFontSize(clampTo<float>(toAnimatableDouble(value)->toDouble(), 0));
+        state.fontBuilder().setSize(animatableValueToFontSize(value));
         return;
     case CSSPropertyFontStretch:
-        style->setFontStretch(animatableValueToFontStretch(value));
+        state.fontBuilder().setStretch(animatableValueToFontStretch(value));
         return;
     case CSSPropertyFontWeight:
-        style->setFontWeight(animatableValueToFontWeight(value));
+        state.fontBuilder().setWeight(animatableValueToFontWeight(value));
         return;
     case CSSPropertyHeight:
         style->setHeight(animatableValueToLength(value, state, ValueRangeNonNegative));
         return;
     case CSSPropertyLeft:
         style->setLeft(animatableValueToLength(value, state));
         return;
     case CSSPropertyLightingColor:
         style->setLightingColor(toAnimatableColor(value)->color());
         return;
@@ skipping 213 matching lines @@
         return;
     case CSSPropertyZoom:
         style->setZoom(clampTo<float>(toAnimatableDouble(value)->toDouble(), std::numeric_limits<float>::denorm_min()));
         return;
     default:
         ASSERT_NOT_REACHED();
     }
 }
 
 } // namespace blink