Make CSSParserMode parameter not optional for MutableStylePropertySet::create()

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 1ed4f6ff4b16226713cc35101729b79803ce6642..97117b87302adbcd7312c2a12ab17214670c874c 100644
--- a/Source/core/css/parser/CSSParser.cpp
+++ b/Source/core/css/parser/CSSParser.cpp
@@ -78,7 +78,7 @@ PassRefPtrWillBeRawPtr<CSSValue> CSSParser::parseSingleValue(CSSPropertyID prope
         return nullptr;
     if (RefPtrWillBeRawPtr<CSSValue> value = CSSParserFastPaths::maybeParseValue(propertyID, string, context.mode()))
         return value;
-    RefPtrWillBeRawPtr<MutableStylePropertySet> stylePropertySet = MutableStylePropertySet::create();
+    RefPtrWillBeRawPtr<MutableStylePropertySet> stylePropertySet = MutableStylePropertySet::create(HTMLQuirksMode);
     bool changed = parseValue(stylePropertySet.get(), propertyID, string, false, context);
     ASSERT_UNUSED(changed, changed == stylePropertySet->hasProperty(propertyID));
     return stylePropertySet->getPropertyCSSValue(propertyID);