Implement PotentialCustomElementName

third_party/WebKit/Source/core/dom/custom/CustomElement.h

Index: third_party/WebKit/Source/core/dom/custom/CustomElement.h
diff --git a/third_party/WebKit/Source/core/dom/custom/CustomElement.h b/third_party/WebKit/Source/core/dom/custom/CustomElement.h
new file mode 100644
index 0000000000000000000000000000000000000000..8a2e93c502b95ce0be48810f98726add880865c6
--- /dev/null
+++ b/third_party/WebKit/Source/core/dom/custom/CustomElement.h
@@ -0,0 +1,22 @@
+// Copyright 2016 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 CustomElement_h
+#define CustomElement_h
+
+#include "core/CoreExport.h"
+#include "wtf/Allocator.h"
+#include "wtf/text/AtomicString.h"
+
+namespace blink {
+
+class CORE_EXPORT CustomElement {
+    STATIC_ONLY(CustomElement);
+public:
+    static bool isPotentialCustomElementName(const AtomicString& name);
+};
+
+} // namespace blink
+
+#endif // CustomElement_h