Oilpan: fix build after r190118.

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 50 matching lines @@
         } else {
             ASSERT(LengthStyleInterpolation::canCreateFrom(*side[i]));
             result->set(i, LengthStyleInterpolation::toInterpolableValue(*side[i]));
         }
     }
     return result.release();
 }
 
 namespace {
 
-PassRefPtr<CSSPrimitiveValue> findValue(InterpolableList* lengthBox, size_t i, CSSPrimitiveValue* start[], CSSPrimitiveValue* end[])
+PassRefPtrWillBeRawPtr<CSSPrimitiveValue> findValue(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);
 }
 
 }