Oilpan: Unship Oilpan from CSSValues

Source/core/animation/VisibilityStyleInterpolation.cpp

Index: Source/core/animation/VisibilityStyleInterpolation.cpp
diff --git a/Source/core/animation/VisibilityStyleInterpolation.cpp b/Source/core/animation/VisibilityStyleInterpolation.cpp
index 5feddd100fea0628671874084df0bcf5f31f31c0..5e21651852ba0e619b1f7f0df1b297465056e245 100644
--- a/Source/core/animation/VisibilityStyleInterpolation.cpp
+++ b/Source/core/animation/VisibilityStyleInterpolation.cpp
@@ -29,7 +29,7 @@ PassOwnPtrWillBeRawPtr<InterpolableValue> VisibilityStyleInterpolation::visibili
     return InterpolableNumber::create(0.0);
 }
 
-PassRefPtrWillBeRawPtr<CSSValue> VisibilityStyleInterpolation::interpolableValueToVisibility(InterpolableValue* value, CSSValueID notVisible)
+PassRefPtr<CSSValue> VisibilityStyleInterpolation::interpolableValueToVisibility(InterpolableValue* value, CSSValueID notVisible)
 {
     ASSERT(value->isNumber());
     InterpolableNumber* number = toInterpolableNumber(value);