Oilpan: fix build after r181825.

Source/core/css/parser/CSSParser.cpp

Index: Source/core/css/parser/CSSParser.cpp
diff --git a/Source/core/css/parser/CSSParser.cpp b/Source/core/css/parser/CSSParser.cpp
index c1f2f743b7f83affe43eecbf15183f9de0c1476a..7582195a7453126c9ac2b9fe559fc2e4e9d0720e 100644
--- a/Source/core/css/parser/CSSParser.cpp
+++ b/Source/core/css/parser/CSSParser.cpp
@@ -66,12 +66,12 @@ bool CSSParser::parseSupportsCondition(const String& condition)
     return BisonCSSParser(CSSParserContext(HTMLStandardMode, 0)).parseSupportsCondition(condition);
 }
 
-PassRefPtr<CSSValueList> CSSParser::parseFontFaceValue(const AtomicString& fontFace)
+PassRefPtrWillBeRawPtr<CSSValueList> CSSParser::parseFontFaceValue(const AtomicString& fontFace)
 {
     return BisonCSSParser::parseFontFaceValue(fontFace);
 }
 
-PassRefPtr<CSSValue> CSSParser::parseAnimationTimingFunctionValue(const String& timingFunction)
+PassRefPtrWillBeRawPtr<CSSValue> CSSParser::parseAnimationTimingFunctionValue(const String& timingFunction)
 {
     return BisonCSSParser::parseAnimationTimingFunctionValue(timingFunction);
 }