Revert of Use Shadow DOM to display fallback content for images

Source/core/html/forms/InputTypeView.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 101 matching lines @@
     virtual void attributeChanged();
     virtual void multipleAttributeChanged();
     virtual void disabledAttributeChanged();
     virtual void readonlyAttributeChanged();
     virtual void requiredAttributeChanged();
     virtual void valueAttributeChanged();
     virtual void listAttributeTargetChanged();
     virtual void updateClearButtonVisibility();
     virtual void updatePlaceholderText();
     virtual AXObject* popupRootAXObject();
-    virtual void ensureFallbackContent() { };
-    virtual void ensurePrimaryContent() { };
-    virtual bool hasFallbackContent() const { return false; };
 
 protected:
     InputTypeView(HTMLInputElement& element) : m_element(&element) { }
     HTMLInputElement& element() const { return *m_element; }
 
 private:
     // Not a RefPtr because the HTMLInputElement object owns this InputTypeView
     // object.
     RawPtrWillBeMember<HTMLInputElement> m_element;
 };
 
 } // namespace blink
 #endif