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

Source/core/animation/NumberSVGInterpolation.h

Index: Source/core/animation/NumberSVGInterpolation.h
diff --git a/Source/core/animation/NumberSVGInterpolation.h b/Source/core/animation/NumberSVGInterpolation.h
index 1cb970700ec5de40dceec956ed011b8b74f56c57..bce2f4668b66bcfc1caabe7c9c8ce90e75b4069b 100644
--- a/Source/core/animation/NumberSVGInterpolation.h
+++ b/Source/core/animation/NumberSVGInterpolation.h
@@ -21,9 +21,9 @@ public:
     typedef SVGNumberList ListType;
     typedef void NonInterpolableType;
 
-    static PassRefPtrWillBeRawPtr<NumberSVGInterpolation> create(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute, SVGNumberNegativeValuesMode negativeValuesMode)
+    static NumberSVGInterpolation* create(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute, SVGNumberNegativeValuesMode negativeValuesMode)
     {
-        return adoptRefWillBeNoop(new NumberSVGInterpolation(toInterpolableValue(start), toInterpolableValue(end), attribute, negativeValuesMode));
+        return new NumberSVGInterpolation(toInterpolableValue(start), toInterpolableValue(end), attribute, negativeValuesMode);
     }
 
     static bool canCreateFrom(SVGPropertyBase* value)
@@ -41,7 +41,7 @@ public:
         SVGInterpolation::trace(visitor);
     }
 
-    static PassOwnPtrWillBeRawPtr<InterpolableNumber> toInterpolableValue(SVGPropertyBase* value)
+    static InterpolableNumber* toInterpolableValue(SVGPropertyBase* value)
     {
         return InterpolableNumber::create(toSVGNumber(value)->value());
     }
@@ -49,7 +49,7 @@ public:
     static PassRefPtrWillBeRawPtr<SVGNumber> fromInterpolableValue(const InterpolableValue&, SVGNumberNegativeValuesMode = AllowNegativeNumbers);
 
 private:
-    NumberSVGInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute, SVGNumberNegativeValuesMode negativeValuesMode)
+    NumberSVGInterpolation(InterpolableValue* start, InterpolableValue* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute, SVGNumberNegativeValuesMode negativeValuesMode)
         : SVGInterpolation(start, end, attribute)
         , m_negativeValuesMode(negativeValuesMode)
     {