Oilpan: Change references to MutableStylePropertySet to transition types.

Source/core/css/parser/BisonCSSParser-in.cpp

Index: Source/core/css/parser/BisonCSSParser-in.cpp
diff --git a/Source/core/css/parser/BisonCSSParser-in.cpp b/Source/core/css/parser/BisonCSSParser-in.cpp
index 8ab5561a934df07b7f2c67e060129f53b35a1b19..b0df31b41bc7a1b9faa4f547e9db09990ef4bb29 100644
--- a/Source/core/css/parser/BisonCSSParser-in.cpp
+++ b/Source/core/css/parser/BisonCSSParser-in.cpp
@@ -993,7 +993,7 @@ PassRefPtrWillBeRawPtr<CSSValueList> BisonCSSParser::parseFontFaceValue(const At
 {
     if (string.isEmpty())
         return nullptr;
-    RefPtr<MutableStylePropertySet> dummyStyle = MutableStylePropertySet::create();
+    RefPtrWillBeRawPtr<MutableStylePropertySet> dummyStyle = MutableStylePropertySet::create();
     if (!parseValue(dummyStyle.get(), CSSPropertyFontFamily, string, false, HTMLQuirksMode, 0))
         return nullptr;
 
@@ -1008,7 +1008,7 @@ PassRefPtrWillBeRawPtr<CSSValue> BisonCSSParser::parseAnimationTimingFunctionVal
 {
     if (string.isEmpty())
         return nullptr;
-    RefPtr<MutableStylePropertySet> style = MutableStylePropertySet::create();
+    RefPtrWillBeRawPtr<MutableStylePropertySet> style = MutableStylePropertySet::create();
     if (!parseValue(style.get(), CSSPropertyAnimationTimingFunction, string, false, HTMLStandardMode, 0))
         return nullptr;