Simplify starting a same-document navigation

Source/core/loader/NavigationScheduler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2009 Adam Barth. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
@@ skipping 292 matching lines @@
 
     // If the URL we're going to navigate to is the same as the current one, except for the
     // fragment part, we don't need to schedule the location change. We'll skip this
     // optimization for cross-origin navigations to minimize the navigator's ability to
     // execute timing attacks.
     if (originDocument->securityOrigin()->canAccess(m_frame->document()->securityOrigin())) {
         KURL parsedURL(ParsedURLString, url);
         if (parsedURL.hasFragmentIdentifier() && equalIgnoringFragmentIdentifier(m_frame->document()->url(), parsedURL)) {
             FrameLoadRequest request(originDocument, ResourceRequest(m_frame->document()->completeURL(url), AtomicString(referrer)), "_self");
             request.setLockBackForwardList(lockBackForwardList);
-            request.setClientRedirect(ClientRedirect);
+            if (lockBackForwardList)
+                request.setClientRedirect(ClientRedirect);
             m_frame->loader().load(request);
             return;
         }
     }
 
     schedule(adoptPtr(new ScheduledLocationChange(originDocument, url, AtomicString(referrer), lockBackForwardList)));
 }
 
 void NavigationScheduler::scheduleFormSubmission(PassRefPtr<FormSubmission> submission)
 {
@@ skipping 70 matching lines @@
 
 void NavigationScheduler::cancel()
 {
     if (m_timer.isActive())
         InspectorInstrumentation::frameClearedScheduledNavigation(m_frame);
     m_timer.stop();
     m_redirect.clear();
 }
 
 } // namespace WebCore