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

Source/core/animation/AngleSVGInterpolation.h

Index: Source/core/animation/AngleSVGInterpolation.h
diff --git a/Source/core/animation/AngleSVGInterpolation.h b/Source/core/animation/AngleSVGInterpolation.h
index dff98327546b74d53909cd619afebc68d2485480..cf765ca4a10e1e1b205383635b7647e13c302cf1 100644
--- a/Source/core/animation/AngleSVGInterpolation.h
+++ b/Source/core/animation/AngleSVGInterpolation.h
@@ -14,9 +14,9 @@ class SVGInteger;
 
 class AngleSVGInterpolation : public SVGInterpolation {
 public:
-    static PassRefPtrWillBeRawPtr<AngleSVGInterpolation> create(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
+    static AngleSVGInterpolation* create(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
     {
-        return adoptRefWillBeNoop(new AngleSVGInterpolation(toInterpolableValue(start), toInterpolableValue(end), attribute));
+        return new AngleSVGInterpolation(toInterpolableValue(start), toInterpolableValue(end), attribute);
     }
 
     static bool canCreateFrom(SVGPropertyBase* value)
@@ -35,12 +35,12 @@ public:
     }
 
 private:
-    AngleSVGInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
+    AngleSVGInterpolation(InterpolableValue* start, InterpolableValue* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
         : SVGInterpolation(start, end, attribute)
     {
     }
 
-    static PassOwnPtrWillBeRawPtr<InterpolableValue> toInterpolableValue(SVGPropertyBase* value)
+    static InterpolableValue* toInterpolableValue(SVGPropertyBase* value)
     {
         return InterpolableNumber::create(toSVGAngle(value)->value());
     }