Oilpan: Move AnimatableValue's hierarchy to oilpan's heap

Source/core/animation/AnimatableLengthSize.cpp

Index: Source/core/animation/AnimatableLengthSize.cpp
diff --git a/Source/core/animation/AnimatableLengthSize.cpp b/Source/core/animation/AnimatableLengthSize.cpp
index b422f39a93126ee63d157f47eed40dd68605379a..e08c7db40c92b94f7fba2e37dc226a957c11c152 100644
--- a/Source/core/animation/AnimatableLengthSize.cpp
+++ b/Source/core/animation/AnimatableLengthSize.cpp
@@ -33,7 +33,7 @@
 
 namespace WebCore {
 
-PassRefPtr<AnimatableValue> AnimatableLengthSize::interpolateTo(const AnimatableValue* value, double fraction) const
+PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableLengthSize::interpolateTo(const AnimatableValue* value, double fraction) const
 {
     const AnimatableLengthSize* lengthSize = toAnimatableLengthSize(value);
     return AnimatableLengthSize::create(
@@ -41,7 +41,7 @@ PassRefPtr<AnimatableValue> AnimatableLengthSize::interpolateTo(const Animatable
         AnimatableValue::interpolate(this->height(), lengthSize->height(), fraction));
 }
 
-PassRefPtr<AnimatableValue> AnimatableLengthSize::addWith(const AnimatableValue* value) const
+PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableLengthSize::addWith(const AnimatableValue* value) const
 {
     const AnimatableLengthSize* lengthSize = toAnimatableLengthSize(value);
     return AnimatableLengthSize::create(
@@ -55,4 +55,10 @@ bool AnimatableLengthSize::equalTo(const AnimatableValue* value) const
     return width()->equals(lengthSize->width()) && height()->equals(lengthSize->height());
 }
 
+void AnimatableLengthSize::trace(Visitor* visitor)
+{
+    visitor->trace(m_width);
+    visitor->trace(m_height);
+}
+
 }