Rename Sky's custom2 to custom

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
deleted file mode 100644
index ced7e5b6aeb7182ddc373eca6984f4a3aaf0699c..0000000000000000000000000000000000000000
--- a/sky/engine/core/dom/custom2/new_custom_element_callback_scope.h
+++ /dev/null
@@ -1,29 +0,0 @@
-// 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_