CSS: Use count position values with 3 parts

third_party/WebKit/Source/core/css/properties/CSSPropertyAPIOffsetPosition.cpp

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyAPIOffsetPosition.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIOffsetPosition.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIOffsetPosition.cpp
index f3a59be6f4af1bd777a7f813fef79f216fb69169..6aa62145c9455ff61c744caace22936e5ad2dadc 100644
--- a/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIOffsetPosition.cpp
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIOffsetPosition.cpp
@@ -11,15 +11,17 @@
 
 namespace blink {
 
+using namespace CSSPropertyParserHelpers;
+
 const CSSValue* CSSPropertyAPIOffsetPosition::parseSingleValue(
     CSSParserTokenRange& range,
     const CSSParserContext& context,
     CSSPropertyID) {
   CSSValueID id = range.Peek().Id();
   if (id == CSSValueAuto)
-    return CSSPropertyParserHelpers::ConsumeIdent(range);
-  CSSValue* value = CSSPropertyParserHelpers::ConsumePosition(
-      range, context.Mode(), CSSPropertyParserHelpers::UnitlessQuirk::kForbid);
+    return ConsumeIdent(range);
+  CSSValue* value = ConsumePosition(range, context, UnitlessQuirk::kForbid,
+                                    Optional<UseCounter::Feature>());
 
   // Count when we receive a valid position other than 'auto'.
   if (value && value->IsValuePair())