Implemented remaining non-grouped longhand property APIs

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

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyAPIAnimationDirection.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIAnimationDirection.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIAnimationDirection.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..98739a903eb4264891faa5e8f45f785e1d01fd3e
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIAnimationDirection.cpp
@@ -0,0 +1,23 @@
+// 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/CSSPropertyAPIAnimationDirection.h"
+
+#include "core/CSSValueKeywords.h"
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+
+namespace blink {
+
+const CSSValue* CSSPropertyAPIAnimationDirection::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext&,
+    const CSSParserLocalContext&) {
+  return CSSPropertyParserHelpers::ConsumeCommaSeparatedList(
+      CSSPropertyParserHelpers::ConsumeIdent<CSSValueNormal, CSSValueAlternate,
+                                             CSSValueReverse,
+                                             CSSValueAlternateReverse>,
+      range);
+}
+
+}  // namespace blink