Update the snap points css properties

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

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyAPIScrollSnapMargin.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIScrollSnapMargin.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIScrollSnapMargin.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..ee0e8e45bdc52c60099749e8930cf2f49f3217be
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIScrollSnapMargin.cpp
@@ -0,0 +1,21 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/css/properties/CSSPropertyAPIScrollSnapMargin.h"
+
+#include "core/css/parser/CSSParserContext.h"
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+
+namespace blink {
+
+const CSSValue* CSSPropertyAPIScrollSnapMargin::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext& context,
+    const CSSParserLocalContext&) {
+  return ConsumeLengthOrPercent(
+      range, context.Mode(), kValueRangeNonNegative,
+      CSSPropertyParserHelpers::UnitlessQuirk::kAllow);
+}
+
+}  // namespace blink