CL for perf tryjob on win

Source/core/animation/css/CSSAnimatableValueFactory.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 160 matching lines @@
 inline static PassRefPtrWillBeRawPtr<AnimatableValue> createFromLengthSize(const LengthSize& lengthSize, const ComputedStyle& style)
 {
     return AnimatableLengthSize::create(
         createFromLength(lengthSize.width(), style),
         createFromLength(lengthSize.height(), style));
 }
 
 inline static PassRefPtrWillBeRawPtr<AnimatableValue> createFromStyleImage(StyleImage* image)
 {
     if (image) {
-        if (RefPtrWillBeRawPtr<CSSValue> cssValue = image->cssValue())
-            return AnimatableImage::create(cssValue.release());
+        if (NullableCSSValue cssValue = image->cssValue())
+            return AnimatableImage::create(*cssValue);
     }
     return AnimatableUnknown::create(CSSValueNone);
 }
 
 inline static PassRefPtrWillBeRawPtr<AnimatableValue> createFromFillSize(const FillSize& fillSize, const ComputedStyle& style)
 {
     switch (fillSize.type) {
     case SizeLength:
         return createFromLengthSize(fillSize.size, style);
     case Contain:
@@ skipping 376 matching lines @@
         if (style.hasAutoZIndex())
             return AnimatableUnknown::create(CSSValueAuto);
         return createFromDouble(style.zIndex());
     default:
         ASSERT_NOT_REACHED();
         return nullptr;
     }
 }
 
 } // namespace blink