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

Source/core/animation/animatable/AnimatableSVGPaint.cpp

Index: Source/core/animation/animatable/AnimatableSVGPaint.cpp
diff --git a/Source/core/animation/animatable/AnimatableSVGPaint.cpp b/Source/core/animation/animatable/AnimatableSVGPaint.cpp
index ad9fe1411269fd2b431941a568fa10392eb5748c..0ca6f61fe05b53f798573281fc32d610ea207f0a 100644
--- a/Source/core/animation/animatable/AnimatableSVGPaint.cpp
+++ b/Source/core/animation/animatable/AnimatableSVGPaint.cpp
@@ -40,13 +40,13 @@ bool AnimatableSVGPaint::usesDefaultInterpolationWith(const AnimatableValue* val
         && (visitedLinkPaintType() != SVG_PAINTTYPE_RGBCOLOR || svgPaint->visitedLinkPaintType() != SVG_PAINTTYPE_RGBCOLOR);
 }
 
-PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableSVGPaint::interpolateTo(const AnimatableValue* value, double fraction) const
+AnimatableValue* AnimatableSVGPaint::interpolateTo(const AnimatableValue* value, double fraction) const
 {
     if (usesDefaultInterpolationWith(value))
         return defaultInterpolateTo(this, value, fraction);
 
     const AnimatableSVGPaint* svgPaint = toAnimatableSVGPaint(value);
-    RefPtrWillBeRawPtr<AnimatableColor> color = toAnimatableColor(AnimatableValue::interpolate(m_color.get(), svgPaint->m_color.get(), fraction).get());
+    AnimatableColor* color = toAnimatableColor(AnimatableValue::interpolate(m_color.get(), svgPaint->m_color.get(), fraction));
     if (fraction < 0.5)
         return create(paintType(), visitedLinkPaintType(), color, uri(), visitedLinkURI());
     return create(svgPaint->paintType(), svgPaint->visitedLinkPaintType(), color, svgPaint->uri(), svgPaint->visitedLinkURI());