Add schedulePageBlock() to navigation scheduler

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 303 matching lines @@
             if (lockBackForwardList)
                 request.setClientRedirect(ClientRedirect);
             m_frame->loader().load(request);
             return;
         }
     }
 
     schedule(adoptPtr(new ScheduledLocationChange(originDocument, url, referrer, lockBackForwardList)));
 }
 
+void NavigationScheduler::schedulePageBlock(Document* originDocument, const Referrer& referrer)
+{
+    ASSERT(m_frame->page());
+    schedule(adoptPtr(new ScheduledLocationChange(originDocument, "data:,", referrer, false)));

[Nate Chapin, 2014/07/14 19:26:40]

I'd prefer to use SecurityOrigin::urlWithUniqueSecurityOrigin() instead of
inlining "data:," here.

[Tom Sepez, 2014/07/14 19:45:49]

I thought there was a threading issue here.  I guess we're on the main thread
here, not a bg parser thread, so I'll change this.

+}
+
 void NavigationScheduler::scheduleFormSubmission(PassRefPtrWillBeRawPtr<FormSubmission> submission)
 {
     ASSERT(m_frame->page());
     schedule(adoptPtr(new ScheduledFormSubmission(submission, mustLockBackForwardList(m_frame))));
 }
 
 void NavigationScheduler::scheduleRefresh()
 {
     if (!shouldScheduleNavigation())
         return;
@@ skipping 74 matching lines @@
 
 void NavigationScheduler::cancel()
 {
     if (m_timer.isActive())
         InspectorInstrumentation::frameClearedScheduledNavigation(m_frame);
     m_timer.stop();
     m_redirect.clear();
 }
 
 } // namespace WebCore