Move rem handling out of CSSParserValues.cpp

Source/core/css/parser/CSSPropertyParser.h

Index: Source/core/css/parser/CSSPropertyParser.h
diff --git a/Source/core/css/parser/CSSPropertyParser.h b/Source/core/css/parser/CSSPropertyParser.h
index c9e16494add599936f3d943bf7109edee00e6b33..654fa2e95575e0a5c99956561bc052da60434c5f 100644
--- a/Source/core/css/parser/CSSPropertyParser.h
+++ b/Source/core/css/parser/CSSPropertyParser.h
@@ -72,7 +72,7 @@ public:
 
     static bool parseValue(CSSPropertyID, bool important,
         CSSParserValueList*, const CSSParserContext&,
-        WillBeHeapVector<CSSProperty, 256>&, StyleRule::Type);
+        WillBeHeapVector<CSSProperty, 256>&, StyleRule::Type, bool& usesRems);
 
     static bool isSystemColor(int id);
 
@@ -376,6 +376,7 @@ private:
     int m_inParseShorthand;
     CSSPropertyID m_currentShorthand;
     bool m_implicitShorthand;
+    bool m_usesRems;
     RefPtrWillBeMember<CSSCalcValue> m_parsedCalculation;
 };