Implements CSSPropertyAPI for the animation-name property.

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

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyAnimationNameUtils.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyAnimationNameUtils.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyAnimationNameUtils.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..074d4dcfe5224d40d40e4c43bd94a6968974816c
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAnimationNameUtils.cpp
@@ -0,0 +1,32 @@
+// 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/CSSPropertyAnimationNameUtils.h"
+
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+#include "core/frame/UseCounter.h"
+
+namespace blink {
+
+CSSValue* CSSPropertyAnimationNameUtils::ConsumeAnimationName(
+    CSSParserTokenRange& range,
+    const CSSParserContext* context,
+    bool allow_quoted_name) {
+  if (range.Peek().Id() == CSSValueNone)
+    return CSSPropertyParserHelpers::ConsumeIdent(range);
+
+  if (allow_quoted_name && range.Peek().GetType() == kStringToken) {
+    // Legacy support for strings in prefixed animations.
+    context->Count(UseCounter::kQuotedAnimationName);
+
+    const CSSParserToken& token = range.ConsumeIncludingWhitespace();
+    if (EqualIgnoringASCIICase(token.Value(), "none"))
+      return CSSIdentifierValue::Create(CSSValueNone);
+    return CSSCustomIdentValue::Create(token.Value().ToAtomicString());
+  }
+
+  return CSSPropertyParserHelpers::ConsumeCustomIdent(range);
+}
+
+}  // namespace blink