Update the snap points css properties

third_party/WebKit/Source/core/css/StylePropertySerializer.cpp

Index: third_party/WebKit/Source/core/css/StylePropertySerializer.cpp
diff --git a/third_party/WebKit/Source/core/css/StylePropertySerializer.cpp b/third_party/WebKit/Source/core/css/StylePropertySerializer.cpp
index 21c373448600917a394ec741e9148bd74801339a..3e42083d8a84347e5becf8672e79bd3fda3d6f90 100644
--- a/third_party/WebKit/Source/core/css/StylePropertySerializer.cpp
+++ b/third_party/WebKit/Source/core/css/StylePropertySerializer.cpp
@@ -506,6 +506,18 @@ String StylePropertySerializer::GetPropertyValue(
     }
     case CSSPropertyBorderRadius:
       return Get4Values(borderRadiusShorthand());
+    case CSSPropertyScrollPadding:
+      return Get4Values(scrollPaddingShorthand());
+    case CSSPropertyScrollPaddingBlock:
+      return Get2Values(scrollPaddingBlockShorthand());
+    case CSSPropertyScrollPaddingInline:
+      return Get2Values(scrollPaddingInlineShorthand());
+    case CSSPropertyScrollSnapMargin:
+      return Get4Values(scrollSnapMarginShorthand());
+    case CSSPropertyScrollSnapMarginBlock:
+      return Get2Values(scrollSnapMarginBlockShorthand());
+    case CSSPropertyScrollSnapMarginInline:
+      return Get2Values(scrollSnapMarginInlineShorthand());
     default:
       return String();
   }
@@ -695,6 +707,32 @@ String StylePropertySerializer::OffsetValue() const {
   return result.ToString();
 }
 
+String StylePropertySerializer::Get2Values(
+    const StylePropertyShorthand& shorthand) const {
+  // Assume the properties are in the usual order start, end.
+  int start_value_index =
+      property_set_.FindPropertyIndex(shorthand.properties()[0]);
+  int end_value_index =
+      property_set_.FindPropertyIndex(shorthand.properties()[1]);
+
+  if (start_value_index == -1 || end_value_index == -1)
+    return String();
+
+  PropertyValueForSerializer start =
+      property_set_.PropertyAt(start_value_index);
+  PropertyValueForSerializer end = property_set_.PropertyAt(end_value_index);
+
+  bool show_end = !DataEquivalent(start.Value(), end.Value());
+
+  StringBuilder result;
+  result.Append(start.Value()->CssText());
+  if (show_end) {
+    result.Append(' ');
+    result.Append(end.Value()->CssText());
+  }
+  return result.ToString();
+}
+
 String StylePropertySerializer::Get4Values(
     const StylePropertyShorthand& shorthand) const {
   // Assume the properties are in the usual order top, right, bottom, left.