Implement left property animation on InvalidatableStyleInterpolation

Source/core/animation/LengthStyleInterpolation.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/LengthStyleInterpolation.h"
 
 #include "core/animation/css/CSSAnimatableValueFactory.h"
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/resolver/StyleBuilder.h"
@@ skipping 294 matching lines @@
                 return CSSPrimitiveValue::create(value, toUnitType(i));
             }
         }
         ASSERT_NOT_REACHED();
     default:
         ValueRange valueRange = (range == RangeNonNegative) ? ValueRangeNonNegative : ValueRangeAll;
         return CSSPrimitiveValue::create(CSSCalcValue::create(constructCalcExpression(listOfValuesAndTypes), valueRange));
     }
 }
 
+void LengthStyleInterpolation::applyInterpolableValue(CSSPropertyID property, const InterpolableValue& value, InterpolationRange range, StyleResolverState& state, LengthSetter lengthSetter)
+{
+    if (lengthSetter && isPixelsOrPercentOnly(value)) {
+        (state.style()->*lengthSetter)(lengthFromInterpolableValue(value, range, state.style()->effectiveZoom()));
+#if ENABLE(ASSERT)
+        RefPtrWillBeRawPtr<AnimatableValue> before = CSSAnimatableValueFactory::create(property, *state.style());
+        StyleBuilder::applyProperty(property, state, fromInterpolableValue(value, range).get());
+        RefPtrWillBeRawPtr<AnimatableValue> after = CSSAnimatableValueFactory::create(property, *state.style());
+        ASSERT(before->equals(*after));
+#endif
+    } else {
+        StyleBuilder::applyProperty(property, state, fromInterpolableValue(value, range).get());
+    }
+}
+
 void LengthStyleInterpolation::apply(StyleResolverState& state) const
 {
-    if (m_lengthSetter) {
-        (state.style()->*m_lengthSetter)(lengthFromInterpolableValue(*m_cachedValue, m_range, state.style()->effectiveZoom()));
-#if ENABLE(ASSERT)
-        RefPtrWillBeRawPtr<AnimatableValue> before = CSSAnimatableValueFactory::create(m_id, *state.style());
-        StyleBuilder::applyProperty(m_id, state, fromInterpolableValue(*m_cachedValue, m_range).get());
-        RefPtrWillBeRawPtr<AnimatableValue> after = CSSAnimatableValueFactory::create(m_id, *state.style());
-        ASSERT(before->equals(*after));
-#endif
-    } else {
-        StyleBuilder::applyProperty(m_id, state, fromInterpolableValue(*m_cachedValue, m_range).get());
-    }
+    applyInterpolableValue(m_id, *m_cachedValue, m_range, state, m_lengthSetter);
 }
 
 DEFINE_TRACE(LengthStyleInterpolation)
 {
     StyleInterpolation::trace(visitor);
 }
 
 }