Implements CSSPropertyAPI for the webkit-highlight property.

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

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyAPIWebkitHighlight.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIWebkitHighlight.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIWebkitHighlight.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..798e4ca1f8a6f0a80cfa3c6ba3b697461e62917e
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIWebkitHighlight.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/CSSPropertyAPIWebkitHighlight.h"
+
+#include "core/css/CSSStringValue.h"
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+
+namespace blink {
+
+const CSSValue* CSSPropertyAPIWebkitHighlight::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext* context) {
+  if (range.peek().id() == CSSValueNone)
+    return CSSPropertyParserHelpers::consumeIdent(range);
+  return CSSPropertyParserHelpers::consumeString(range);
+}
+
+}  // namespace blink