Web Animations: Add SVGNumberInterpolationType

third_party/WebKit/Source/core/animation/NumberAttributeFunctions.h

+// Copyright 2015 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.
+
+#ifndef NumberAttributeFunctions_h
+#define NumberAttributeFunctions_h
+
+#include "core/SVGNames.h"
+
+namespace blink {
+
+class NumberAttributeFunctions {
+public:
+    static bool isNonNegative(const QualifiedName& attribute)
+    {
+        return attribute == SVGNames::pathLengthAttr;
+    }
+};
+
+} // namespace blink
+
+#endif // NumberAttributeFunctions_h