Rename Sky's custom2 to custom

sky/engine/core/dom/custom/custom_element.h

Index: sky/engine/core/dom/custom/custom_element.h
diff --git a/sky/engine/core/dom/custom2/new_custom_element.h b/sky/engine/core/dom/custom/custom_element.h
similarity index 93%
rename from sky/engine/core/dom/custom2/new_custom_element.h
rename to sky/engine/core/dom/custom/custom_element.h
index 9c3b76c4ff1427dd87de07f859389511808a0f5c..b50fd33072b4d51dca4278f49c353e37a31bf62c 100644
--- a/sky/engine/core/dom/custom2/new_custom_element.h
+++ b/sky/engine/core/dom/custom/custom_element.h
@@ -11,14 +11,14 @@ namespace blink {
 class Document;
 class Element;
 
-class NewCustomElement {
+class CustomElement {
  public:
   static void AttributeDidChange(Element*, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue);
   static void DidAttach(Element*, Document&);
   static void DidDetach(Element*, Document&);
 
  private:
-  NewCustomElement();
+  CustomElement();
 };
 
 }  // namespace blink