CSS: Use count position values with 3 parts

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

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyShapeUtils.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyShapeUtils.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyShapeUtils.cpp
index 393a62be5f36e308c2faed34b923f99236383ae9..f2b443aa9b1e9b288e51f05f73918d4876b5aa52 100644
--- a/third_party/WebKit/Source/core/css/properties/CSSPropertyShapeUtils.cpp
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyShapeUtils.cpp
@@ -34,9 +34,12 @@ static CSSBasicShapeCircleValue* ConsumeBasicShapeCircle(
   if (ConsumeIdent<CSSValueAt>(args)) {
     CSSValue* center_x = nullptr;
     CSSValue* center_y = nullptr;
-    if (!ConsumePosition(args, context.Mode(), UnitlessQuirk::kForbid, center_x,
-                         center_y))
+    auto syntax = CSSPropertyParserHelpers::PositionSyntax::kPermitThreeValues;
+    if (!ConsumePosition(args, context, UnitlessQuirk::kForbid, syntax,
+                         center_x, center_y))
       return nullptr;
+    if (syntax == CSSPropertyParserHelpers::PositionSyntax::kCountThreeValues)
+      context.Count(UseCounter::kThreeValuedPositionBasicShape);
     shape->SetCenterX(center_x);
     shape->SetCenterY(center_y);
   }
@@ -57,9 +60,12 @@ static CSSBasicShapeEllipseValue* ConsumeBasicShapeEllipse(
   if (ConsumeIdent<CSSValueAt>(args)) {
     CSSValue* center_x = nullptr;
     CSSValue* center_y = nullptr;
-    if (!ConsumePosition(args, context.Mode(), UnitlessQuirk::kForbid, center_x,
-                         center_y))
+    auto syntax = CSSPropertyParserHelpers::PositionSyntax::kPermitThreeValues;
+    if (!ConsumePosition(args, context, UnitlessQuirk::kForbid, syntax,
+                         center_x, center_y))
       return nullptr;
+    if (syntax == CSSPropertyParserHelpers::PositionSyntax::kCountThreeValues)
+      context.Count(UseCounter::kThreeValuedPositionBasicShape);
     shape->SetCenterX(center_x);
     shape->SetCenterY(center_y);
   }