Implements CSSPropertyAPI for the webkit-box-flex-group property.

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

+// 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/CSSPropertyAPIWebkitBoxFlexGroup.h"
+
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+
+namespace blink {
+
+const CSSValue* CSSPropertyAPIWebkitBoxFlexGroup::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext* context) {
+  return CSSPropertyParserHelpers::consumeInteger(range, 0);
+}
+
+}  // namespace blink