Rename Sky's custom2 to custom

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

Index: sky/engine/core/dom/custom2/new_custom_element_callback_scope.cc
diff --git a/sky/engine/core/dom/custom2/new_custom_element_callback_scope.cc b/sky/engine/core/dom/custom2/new_custom_element_callback_scope.cc
deleted file mode 100644
index 58fb3e97494c6a0c83ed8f42a4debbbdf6cdc287..0000000000000000000000000000000000000000
--- a/sky/engine/core/dom/custom2/new_custom_element_callback_scope.cc
+++ /dev/null
@@ -1,39 +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.
-
-#include "sky/engine/config.h"
-#include "sky/engine/core/dom/custom2/new_custom_element_callback_scope.h"
-
-#include "base/callback.h"
-
-namespace blink {
-namespace {
-static NewCustomElementCallbackScope* g_current = nullptr;
-}
-
-NewCustomElementCallbackScope::NewCustomElementCallbackScope()
-    : previous_scope_(g_current) {
-  g_current = this;
-}
-
-NewCustomElementCallbackScope::~NewCustomElementCallbackScope() {
-  while(!callbacks_.isEmpty()) {
-    Vector<base::Closure> local;
-    callbacks_.swap(local);
-    for (const auto& callback : local)
-      callback.Run();
-  }
-
-  g_current = previous_scope_;
-}
-
-NewCustomElementCallbackScope* NewCustomElementCallbackScope::Current() {
-  return g_current;
-}
-
-void NewCustomElementCallbackScope::Enqueue(const base::Closure& callback) {
-  callbacks_.append(callback);
-}
-
-}  // namespace blink