Update the snap points css properties

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 488 matching lines @@
     case CSSPropertyWebkitTextStroke:
       return GetShorthandValue(webkitTextStrokeShorthand());
     case CSSPropertyMarker: {
       if (const CSSValue* value =
               property_set_.GetPropertyCSSValue(CSSPropertyMarkerStart))
         return value->CssText();
       return String();
     }
     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();
   }
 }
 
 String StylePropertySerializer::BorderSpacingValue(
     const StylePropertyShorthand& shorthand) const {
   const CSSValue* horizontal_value =
       property_set_.GetPropertyCSSValue(shorthand.properties()[0]);
   const CSSValue* vertical_value =
@@ skipping 169 matching lines @@
     const CSSValue* anchor =
         property_set_.GetPropertyCSSValue(CSSPropertyOffsetAnchor);
     if (!anchor->IsInitialValue()) {
       result.Append(" / ");
       result.Append(anchor->CssText());
     }
   }
   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.
   int top_value_index =
       property_set_.FindPropertyIndex(shorthand.properties()[0]);
   int right_value_index =
       property_set_.FindPropertyIndex(shorthand.properties()[1]);
   int bottom_value_index =
       property_set_.FindPropertyIndex(shorthand.properties()[2]);
   int left_value_index =
@@ skipping 287 matching lines @@
                       : repeat_x;
     const CSSValue& y_value =
         repeat_y_list ? repeat_y_list->Item(i % repeat_y_list->length())
                       : repeat_y;
     AppendBackgroundRepeatValue(builder, x_value, y_value);
   }
   return builder.ToString();
 }
 
 }  // namespace blink