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

Source/core/animation/AnimationEffectTiming.cpp

Index: Source/core/animation/AnimationEffectTiming.cpp
diff --git a/Source/core/animation/AnimationEffectTiming.cpp b/Source/core/animation/AnimationEffectTiming.cpp
index 6f9fd6f5f4188c6bda5efb2a8bdde10190b9a210..d07c5b90bed21b89585229ed6005a9a68922c9e2 100644
--- a/Source/core/animation/AnimationEffectTiming.cpp
+++ b/Source/core/animation/AnimationEffectTiming.cpp
@@ -12,9 +12,9 @@
 
 namespace blink {
 
-PassRefPtrWillBeRawPtr<AnimationEffectTiming> AnimationEffectTiming::create(AnimationEffect* parent)
+AnimationEffectTiming* AnimationEffectTiming::create(AnimationEffect* parent)
 {
-    return adoptRefWillBeNoop(new AnimationEffectTiming(parent));
+    return new AnimationEffectTiming(parent);
 }
 
 AnimationEffectTiming::AnimationEffectTiming(AnimationEffect* parent)