Parsing CSS properties for scroll snap points

Source/core/css/CSSPrimitiveValueMappings.h

Index: Source/core/css/CSSPrimitiveValueMappings.h
diff --git a/Source/core/css/CSSPrimitiveValueMappings.h b/Source/core/css/CSSPrimitiveValueMappings.h
index f3b1abe27f651c8e2c088811fabf8f97f6435a6a..7d72d61fa55071727bea5515ae2a92bd3a4b75c7 100644
--- a/Source/core/css/CSSPrimitiveValueMappings.h
+++ b/Source/core/css/CSSPrimitiveValueMappings.h
@@ -4719,6 +4719,39 @@ template<> inline CSSPrimitiveValue::operator ScrollBehavior() const
     return ScrollBehaviorAuto;
 }
 
+template<> inline CSSPrimitiveValue::CSSPrimitiveValue(ScrollSnapType snapType)
+    : CSSValue(PrimitiveClass)
+{
+    m_primitiveUnitType = CSS_VALUE_ID;
+    switch (snapType) {
+    case ScrollSnapTypeNone:
+        m_value.valueID = CSSValueNone;
+        break;
+    case ScrollSnapTypeMandatory:
+        m_value.valueID = CSSValueMandatory;
+        break;
+    case ScrollSnapTypeProximity:
+        m_value.valueID = CSSValueProximity;
+        break;
+    }
+}
+
+template<> inline CSSPrimitiveValue::operator ScrollSnapType() const
+{
+    switch (getValueID()) {
+    case CSSValueNone:
+        return ScrollSnapTypeNone;
+    case CSSValueMandatory:
+        return ScrollSnapTypeMandatory;
+    case CSSValueProximity:
+        return ScrollSnapTypeProximity;
+    default:
+        break;
+    }
+    ASSERT_NOT_REACHED();
+    return ScrollSnapTypeNone;
+}
+
 } // namespace blink
 
 #endif