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..295d0a12e5290590888f69bf0eaadcfd4895b2f0
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIAnimationDirection.cpp
@@ -0,0 +1,22 @@
+// 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"
+
+namespace blink {
+
+class CSSParserContext;
+class CSSParserLocalContext;
+class CSSParserTokenRange;
+class CSSValue;
+
+const CSSValue* CSSPropertyAPIAnimationDirection::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext&,
+    const CSSParserLocalContext&) {
+  return ConsumeIdent<CSSValueNormal, CSSValueAlternate, CSSValueReverse,
+                      CSSValueAlternateReverse>(range);
+}
+
+}  // namespace blink