Add loadedNonEmptyDocument flag in iframe for Resource Timing

Source/core/loader/FrameLoaderStateMachine.h

 /*
  * 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:
  *
  * 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
@@ skipping 31 matching lines @@
 
     // Once a load has been committed, the state may
     // alternate between CommittedFirstRealLoad and FirstLayoutDone.
     // Otherwise, the states only go down the list.
     enum State {
         CreatingInitialEmptyDocument,
         DisplayingInitialEmptyDocument,
         CommittedFirstRealLoad
     };
 
-    bool committingFirstRealLoad() const;
     bool committedFirstRealDocumentLoad() const;
     bool creatingInitialEmptyDocument() const;
     bool isDisplayingInitialEmptyDocument() const;
     void advanceTo(State);
 
 private:
     State m_state;
 };
 
 } // namespace WebCore
 
 #endif // FrameLoaderStateMachine_h