Oilpan: fix build after r190292.

Source/core/animation/LengthBoxStyleInterpolation.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/animation/LengthBoxStyleInterpolation.h"
 
 #include "core/css/resolver/StyleBuilder.h"
 
 namespace blink {
@@ skipping 52 matching lines @@
     const CSSPrimitiveValue& startValue = toCSSPrimitiveValue(start);
     const CSSPrimitiveValue& endValue = toCSSPrimitiveValue(end);
     if ((startValue.isValueID() && startValue.getValueID() == CSSValueAuto)
         || (endValue.isValueID() && endValue.getValueID() == CSSValueAuto))
         return true;
     return onlyInterpolateBetweenLengthAndCSSValueAuto(*startValue.getRectValue(), *endValue.getRectValue());
 }
 
 namespace {
 
-PassRefPtr<CSSPrimitiveValue> indexedValueToLength(InterpolableList& lengthBox, size_t i, CSSPrimitiveValue* start[], CSSPrimitiveValue* end[])
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> indexedValueToLength(InterpolableList& lengthBox, size_t i, CSSPrimitiveValue* start[], CSSPrimitiveValue* end[])
 {
     if (lengthBox.get(i)->isBool()) {
         if (toInterpolableBool(lengthBox.get(i))->value())
             return end[i];
         return start[i];
     }
     return LengthStyleInterpolation::fromInterpolableValue(*lengthBox.get(i), RangeAll);
 }
 
 }
@@ skipping 53 matching lines @@
 }
 
 void LengthBoxStyleInterpolation::trace(Visitor* visitor)
 {
     StyleInterpolation::trace(visitor);
     visitor->trace(m_startCSSValue);
     visitor->trace(m_endCSSValue);
 }
 
 }