Implements CSSPropertyAPI for the margin properties.

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

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyAPIWebkitMargin.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIWebkitMargin.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIWebkitMargin.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b91ec9151085118225f0d9de7da371f152d0eaaa
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIWebkitMargin.cpp
@@ -0,0 +1,20 @@
+// 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/CSSPropertyAPIWebkitMargin.h"
+
+#include "core/css/parser/CSSParserContext.h"
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+#include "core/css/properties/CSSPropertyMarginUtils.h"
+
+namespace blink {
+
+const CSSValue* CSSPropertyAPIWebkitMargin::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext* context) {
+  return CSSPropertyMarginUtils::consumeMarginOrOffset(
+      range, context->mode(), CSSPropertyParserHelpers::UnitlessQuirk::Forbid);
+}
+
+}  // namespace blink