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

Source/core/animation/CompositorAnimations.cpp

Index: Source/core/animation/CompositorAnimations.cpp
diff --git a/Source/core/animation/CompositorAnimations.cpp b/Source/core/animation/CompositorAnimations.cpp
index 62eef54ffef1e562c34dc525042b2944231653df..82cc874efacdc04c27d113639448695487107457 100644
--- a/Source/core/animation/CompositorAnimations.cpp
+++ b/Source/core/animation/CompositorAnimations.cpp
@@ -152,8 +152,8 @@ bool CompositorAnimations::getAnimatedBoundingBox(FloatBox& box, const Animation
         FloatBox originalBox(box);
 
         for (size_t j = 0; j < frames.size() - 1; ++j) {
-            const AnimatableTransform* startTransform = toAnimatableTransform(frames[j]->getAnimatableValue().get());
-            const AnimatableTransform* endTransform = toAnimatableTransform(frames[j+1]->getAnimatableValue().get());
+            const AnimatableTransform* startTransform = toAnimatableTransform(frames[j]->getAnimatableValue());
+            const AnimatableTransform* endTransform = toAnimatableTransform(frames[j+1]->getAnimatableValue());
             if (!startTransform || !endTransform)
                 return false;
 
@@ -216,11 +216,11 @@ bool CompositorAnimations::isCandidateForAnimationOnCompositor(const Timing& tim
             case CSSPropertyOpacity:
                 break;
             case CSSPropertyTransform:
-                if (toAnimatableTransform(keyframe->getAnimatableValue().get())->transformOperations().dependsOnBoxSize())
+                if (toAnimatableTransform(keyframe->getAnimatableValue())->transformOperations().dependsOnBoxSize())
                     return false;
                 break;
             case CSSPropertyWebkitFilter: {
-                const FilterOperations& operations = toAnimatableFilterOperations(keyframe->getAnimatableValue().get())->operations();
+                const FilterOperations& operations = toAnimatableFilterOperations(keyframe->getAnimatableValue())->operations();
                 if (operations.hasFilterThatMovesPixels())
                     return false;
                 break;
@@ -564,7 +564,7 @@ void CompositorAnimationsImpl::addKeyframesToCurve(WebCompositorAnimationCurve&
         // FIXME: This relies on StringKeyframes being eagerly evaluated, which will
         // not happen eventually. Instead we should extract the CSSValue here
         // and convert using another set of toAnimatableXXXOperations functions.
-        const AnimatableValue* value = keyframe->getAnimatableValue().get();
+        const AnimatableValue* value = keyframe->getAnimatableValue();
 
         switch (curve.type()) {
         case WebCompositorAnimationCurve::AnimationCurveTypeFilter: {