Reland "Remove children from HistoryNodes that redirect during back/forward navigation"

Source/web/FrameLoaderClientImpl.cpp

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 305 matching lines @@
 void FrameLoaderClientImpl::dispatchDidHandleOnloadEvents()
 {
     if (m_webFrame->client())
         m_webFrame->client()->didHandleOnloadEvents(m_webFrame);
 }
 
 void FrameLoaderClientImpl::dispatchDidReceiveServerRedirectForProvisionalLoad()
 {
     if (m_webFrame->client())
         m_webFrame->client()->didReceiveServerRedirectForProvisionalLoad(m_webFrame);
+    m_webFrame->frame()->page()->historyController().removeChildrenForRedirect(m_webFrame->frame());
 }
 
 void FrameLoaderClientImpl::dispatchDidNavigateWithinPage(HistoryItem* item, HistoryCommitType commitType)
 {
     bool shouldCreateHistoryEntry = commitType == StandardCommit;
     if (shouldCreateHistoryEntry)
         m_webFrame->frame()->page()->historyController().updateBackForwardListForFragmentScroll(m_webFrame->frame(), item);
     m_webFrame->viewImpl()->didCommitLoad(shouldCreateHistoryEntry, true);
     if (m_webFrame->client())
         m_webFrame->client()->didNavigateWithinPage(m_webFrame, shouldCreateHistoryEntry);
@@ skipping 415 matching lines @@
     return m_webFrame->sharedWorkerRepositoryClient();
 }
 
 void FrameLoaderClientImpl::didStopAllLoaders()
 {
     if (m_webFrame->client())
         m_webFrame->client()->didAbortLoading(m_webFrame);
 }
 
 } // namespace blink