CSS: Use count position values with 3 parts

third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
index e29b3bc6b9d72f12275fb08782efe52e328bda78..8e17e52e8a2241271ad63681eeb5ff761284f38f 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
@@ -1647,9 +1647,14 @@ const CSSValue* CSSPropertyParser::ParseSingleValue(
     case CSSPropertyWebkitLogicalHeight:
       return CSSPropertyLengthUtils::ConsumeWidthOrHeight(range_, *context_);
     case CSSPropertyScrollSnapDestination:
+      return ConsumePosition(range_, *context_, UnitlessQuirk::kForbid,
+                             PositionSyntax::kScrollSnapPoints);
     case CSSPropertyObjectPosition:
+      return ConsumePosition(range_, *context_, UnitlessQuirk::kForbid,
+                             PositionSyntax::kObjectPosition);
     case CSSPropertyPerspectiveOrigin:
-      return ConsumePosition(range_, context_->Mode(), UnitlessQuirk::kForbid);
+      return ConsumePosition(range_, *context_, UnitlessQuirk::kForbid,
+                             PositionSyntax::kPerspectiveOrigin);
     case CSSPropertyWebkitHyphenateCharacter:
     case CSSPropertyWebkitLocale:
       return ConsumeLocale(range_);
@@ -2610,8 +2615,8 @@ static bool ConsumeBackgroundPosition(CSSParserTokenRange& range,
   do {
     CSSValue* position_x = nullptr;
     CSSValue* position_y = nullptr;
-    if (!ConsumePosition(range, context->Mode(), unitless, position_x,
-                         position_y))
+    if (!ConsumePosition(range, *context, unitless, PositionSyntax::kBackground,
+                         position_x, position_y))
       return false;
     AddBackgroundValue(result_x, position_x);
     AddBackgroundValue(result_y, position_y);
@@ -2691,8 +2696,8 @@ bool CSSPropertyParser::ConsumeBackgroundShorthand(
           ConsumeRepeatStyleComponent(range_, value, value_y, implicit);
         } else if (property == CSSPropertyBackgroundPositionX ||
                    property == CSSPropertyWebkitMaskPositionX) {
-          if (!ConsumePosition(range_, context_->Mode(), UnitlessQuirk::kForbid,
-                               value, value_y))
+          if (!ConsumePosition(range_, *context_, UnitlessQuirk::kForbid,
+                               PositionSyntax::kBackground, value, value_y))
             continue;
         } else if (property == CSSPropertyBackgroundSize ||
                    property == CSSPropertyWebkitMaskSize) {