IDL: Add [Custom=CallEpilogue] to eliminate CG special cases

Source/core/frame/History.h

 /*
  * Copyright (C) 2007 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 40 matching lines @@
         return adoptRefWillBeNoop(new History(frame));
     }
 
     unsigned length() const;
     SerializedScriptValue* state();
 
     void back(ExecutionContext*);
     void forward(ExecutionContext*);
     void go(ExecutionContext*, int distance);
 
+    void pushState(PassRefPtr<SerializedScriptValue> data, const String& title, const String& url, ExceptionState& exceptionState)
+    {
+        stateObjectAdded(data, title, url, FrameLoadTypeStandard, exceptionState);
+    }
+
+    void replaceState(PassRefPtr<SerializedScriptValue> data, const String& title, const String& url, ExceptionState& exceptionState)
+    {
+        stateObjectAdded(data, title, url, FrameLoadTypeRedirectWithLockedBackForwardList, exceptionState);
+    }
+
     bool stateChanged() const;
     bool isSameAsCurrentState(SerializedScriptValue*) const;
 
     void stateObjectAdded(PassRefPtr<SerializedScriptValue>, const String& title, const String& url, FrameLoadType, ExceptionState&);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit History(LocalFrame*);
 
     KURL urlForState(const String& url);
 
     SerializedScriptValue* stateInternal() const;
 
     RefPtr<SerializedScriptValue> m_lastStateObjectRequested;
 };
 
 } // namespace blink
 
 #endif // History_h