Simply FrameLoaderStateMachine and FrameLoader::transitionToCommitted().

Source/core/loader/HistoryController.h

Index: Source/core/loader/HistoryController.h
diff --git a/Source/core/loader/HistoryController.h b/Source/core/loader/HistoryController.h
index ab70de3772780ad0dc0787f0edf9eda739571a92..4f34236abf9cb521d87eb7f90ba54f193feb9511 100644
--- a/Source/core/loader/HistoryController.h
+++ b/Source/core/loader/HistoryController.h
@@ -46,8 +46,6 @@ class StringWithDirection;
 class HistoryController {
     WTF_MAKE_NONCOPYABLE(HistoryController);
 public:
-    enum HistoryUpdateType { UpdateAll, UpdateAllExceptBackForwardList };
-
     explicit HistoryController(Frame*);
     ~HistoryController();
 
@@ -61,10 +59,6 @@ public:
     void saveDocumentAndScrollState();
     void restoreDocumentState();
 
-    void updateForBackForwardNavigation();
-    void updateForReload();
-    void updateForStandardLoad(HistoryUpdateType updateType = UpdateAll);
-    void updateForRedirectWithLockedBackForwardList();
     void updateForClientRedirect();
     void updateForCommit();
     void updateForSameDocumentNavigation();
@@ -94,6 +88,11 @@ private:
     PassRefPtr<HistoryItem> createItem();
     PassRefPtr<HistoryItem> createItemTree(Frame* targetFrame, bool clipAtTarget);
 
+    void updateForBackForwardNavigation();
+    void updateForReload();
+    void updateForStandardLoad();
+    void updateForRedirectWithLockedBackForwardList();
+
     void recursiveSetProvisionalItem(HistoryItem*, HistoryItem*, FrameLoadType);
     void recursiveGoToItem(HistoryItem*, HistoryItem*, FrameLoadType);
     bool isReplaceLoadTypeWithProvisionalItem(FrameLoadType);