[Oilpan] Migrate most classes under core/animations to Oilpan heap.

Source/core/css/resolver/AnimatedStyleBuilder.cpp

Index: Source/core/css/resolver/AnimatedStyleBuilder.cpp
diff --git a/Source/core/css/resolver/AnimatedStyleBuilder.cpp b/Source/core/css/resolver/AnimatedStyleBuilder.cpp
index 76ae3865e7519f0f2082e9893f973541653bd17a..c66d64c33ebd7e3e811569eaefb0d84c02211042 100644
--- a/Source/core/css/resolver/AnimatedStyleBuilder.cpp
+++ b/Source/core/css/resolver/AnimatedStyleBuilder.cpp
@@ -156,7 +156,7 @@ void setFillSize(FillLayer* fillLayer, const AnimatableValue* value, StyleResolv
 template <CSSPropertyID property>
 void setOnFillLayers(FillLayer& fillLayers, const AnimatableValue* value, StyleResolverState& state)
 {
-    const WillBeHeapVector<RefPtrWillBeMember<AnimatableValue>>& values = toAnimatableRepeatable(value)->values();
+    const HeapVector<Member<AnimatableValue>>& values = toAnimatableRepeatable(value)->values();
     ASSERT(!values.isEmpty());
     FillLayer* fillLayer = &fillLayers;
     FillLayer* prev = 0;