Simplify PROGRESS shadow elements.

third_party/WebKit/Source/core/html/shadow/ProgressShadowElement.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. 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
  * notice, this list of conditions and the following disclaimer.
@@ skipping 23 matching lines @@
 
 #include "core/html/HTMLDivElement.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class HTMLProgressElement;
 
 class ProgressShadowElement : public HTMLDivElement {
 public:
+    DECLARE_NODE_FACTORY(ProgressShadowElement);
+
+private:
     explicit ProgressShadowElement(Document&);
     HTMLProgressElement* progressElement() const;
-
-protected:
     bool layoutObjectIsNeeded(const ComputedStyle&) override;
 };
 
-class ProgressInnerElement final : public ProgressShadowElement {
-public:
-    DECLARE_NODE_FACTORY(ProgressInnerElement);
-
-private:
-    explicit ProgressInnerElement(Document&);
-
-    bool layoutObjectIsNeeded(const ComputedStyle&) override;
-};
-
-class ProgressBarElement final : public ProgressShadowElement {
-public:
-    DECLARE_NODE_FACTORY(ProgressBarElement);
-
-private:
-    explicit ProgressBarElement(Document&);
-};
-
-class ProgressValueElement final : public ProgressShadowElement {
-public:
-    DECLARE_NODE_FACTORY(ProgressValueElement);
-    void setWidthPercentage(double);
-
-private:
-    explicit ProgressValueElement(Document&);
-};
-
 } // namespace blink
 
 #endif // ProgressShadowElement_h