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

Source/core/animation/LengthSVGInterpolation.cpp

Index: Source/core/animation/LengthSVGInterpolation.cpp
diff --git a/Source/core/animation/LengthSVGInterpolation.cpp b/Source/core/animation/LengthSVGInterpolation.cpp
index 35e1e3107ca84c16158e943271a138d91f8faca0..c021d7e70711fe1859284351d5cefc66b9443769 100644
--- a/Source/core/animation/LengthSVGInterpolation.cpp
+++ b/Source/core/animation/LengthSVGInterpolation.cpp
@@ -21,12 +21,12 @@ PassRefPtrWillBeRawPtr<SVGLengthList> LengthSVGInterpolation::createList(const S
     return SVGLengthList::create(animatedLengthList.currentValue()->unitMode());
 }
 
-PassRefPtrWillBeRawPtr<LengthSVGInterpolation> LengthSVGInterpolation::create(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
+LengthSVGInterpolation* LengthSVGInterpolation::create(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
 {
     NonInterpolableType modeData;
-    OwnPtrWillBeRawPtr<InterpolableValue> startValue = toInterpolableValue(toSVGLength(start).get(), attribute.get(), &modeData);
-    OwnPtrWillBeRawPtr<InterpolableValue> endValue = toInterpolableValue(toSVGLength(end).get(), attribute.get(), nullptr);
-    return adoptRefWillBeNoop(new LengthSVGInterpolation(startValue.release(), endValue.release(), attribute, modeData));
+    InterpolableValue* startValue = toInterpolableValue(toSVGLength(start).get(), attribute.get(), &modeData);
+    InterpolableValue* endValue = toInterpolableValue(toSVGLength(end).get(), attribute.get(), nullptr);
+    return new LengthSVGInterpolation(startValue, endValue, attribute, modeData);
 }
 
 namespace {
@@ -103,7 +103,7 @@ LengthInterpolatedUnit convertToInterpolatedUnit(SVGLengthType lengthType, doubl
 
 } // namespace
 
-PassOwnPtrWillBeRawPtr<InterpolableValue> LengthSVGInterpolation::toInterpolableValue(SVGLength* length, const SVGAnimatedPropertyBase* attribute, NonInterpolableType* ptrModeData)
+InterpolableValue* LengthSVGInterpolation::toInterpolableValue(SVGLength* length, const SVGAnimatedPropertyBase* attribute, NonInterpolableType* ptrModeData)
 {
     if (ptrModeData)
         populateModeData(attribute, ptrModeData);
@@ -114,10 +114,10 @@ PassOwnPtrWillBeRawPtr<InterpolableValue> LengthSVGInterpolation::toInterpolable
     double values[numLengthInterpolatedUnits] = { };
     values[unitType] = value;
 
-    OwnPtrWillBeRawPtr<InterpolableList> listOfValues = InterpolableList::create(numLengthInterpolatedUnits);
+    InterpolableList* listOfValues = InterpolableList::create(numLengthInterpolatedUnits);
     for (size_t i = 0; i < numLengthInterpolatedUnits; ++i)
         listOfValues->set(i, InterpolableNumber::create(values[i]));
-    return listOfValues.release();
+    return listOfValues;
 }
 
 PassRefPtrWillBeRawPtr<SVGLength> LengthSVGInterpolation::fromInterpolableValue(const InterpolableValue& interpolableValue, const NonInterpolableType& modeData, const SVGElement* element)