Implement Custom Elements

sky/engine/core/dom/custom2/new_custom_element_callback_scope.h

Index: sky/engine/core/dom/custom2/new_custom_element_callback_scope.h
diff --git a/sky/engine/core/dom/custom2/new_custom_element_callback_scope.h b/sky/engine/core/dom/custom2/new_custom_element_callback_scope.h
new file mode 100644
index 0000000000000000000000000000000000000000..ced7e5b6aeb7182ddc373eca6984f4a3aaf0699c
--- /dev/null
+++ b/sky/engine/core/dom/custom2/new_custom_element_callback_scope.h
@@ -0,0 +1,29 @@
+// 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 SKY_ENGINE_CORE_DOM_CUSTOM_NEW_CUSTOM_ELEMENT_CALLBACK_SCOPE_H_
+#define SKY_ENGINE_CORE_DOM_CUSTOM_NEW_CUSTOM_ELEMENT_CALLBACK_SCOPE_H_
+
+#include "base/callback_forward.h"
+#include "sky/engine/wtf/Vector.h"
+
+namespace blink {
+
+class NewCustomElementCallbackScope {
+ public:
+  NewCustomElementCallbackScope();
+  ~NewCustomElementCallbackScope();
+
+  void Enqueue(const base::Closure&);
+
+  static NewCustomElementCallbackScope* Current();
+
+ private:
+  NewCustomElementCallbackScope* previous_scope_;
+  Vector<base::Closure> callbacks_;
+};
+
+}  // namespace blink
+
+#endif  // SKY_ENGINE_CORE_DOM_CUSTOM_NEW_CUSTOM_ELEMENT_CALLBACK_SCOPE_H_