Implement NavigationScheduler::schedulePageBlock() as a redirect to empty substitute data.

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 30 matching lines @@
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FormState.h"
 #include "core/loader/FormSubmission.h"
 #include "core/loader/FrameLoadRequest.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/loader/FrameLoaderStateMachine.h"
 #include "core/page/BackForwardClient.h"
 #include "core/page/Page.h"
+#include "platform/SharedBuffer.h"
 #include "platform/UserGestureIndicator.h"
 #include "wtf/CurrentTime.h"
 
 namespace blink {
 
 unsigned NavigationDisablerForBeforeUnload::s_navigationDisableCount = 0;
 
 class ScheduledNavigation {
     WTF_MAKE_NONCOPYABLE(ScheduledNavigation); WTF_MAKE_FAST_ALLOCATED;
 public:
@@ skipping 106 matching lines @@
     virtual void fire(LocalFrame* frame) OVERRIDE
     {
         OwnPtr<UserGestureIndicator> gestureIndicator = createUserGestureIndicator();
         FrameLoadRequest request(originDocument(), ResourceRequest(KURL(ParsedURLString, url()), referrer(), ReloadIgnoringCacheData), "_self");
         request.setLockBackForwardList(lockBackForwardList());
         request.setClientRedirect(ClientRedirect);
         frame->loader().load(request);
     }
 };
 
+class ScheduledPageBlock FINAL : public ScheduledURLNavigation {
+public:
+    ScheduledPageBlock(Document* originDocument, const String& url, const Referrer& referrer)
+        : ScheduledURLNavigation(0.0, originDocument, url, referrer, true, true)
+    {
+    }
+
+    virtual void fire(LocalFrame* frame) OVERRIDE
+    {
+        OwnPtr<UserGestureIndicator> gestureIndicator = createUserGestureIndicator();

[Mike West, 2014/07/30 16:57:39]

Nit: Do we need a user gesture here?

+        SubstituteData substituteData(SharedBuffer::create(), "text/plain", "UTF-8", KURL(), ForceSynchronousLoad);
+        FrameLoadRequest request(originDocument(), ResourceRequest(KURL(ParsedURLString, url()), referrer(), ReloadIgnoringCacheData), substituteData);
+        request.setLockBackForwardList(true);
+        request.setClientRedirect(ClientRedirect);
+        frame->loader().load(request);
+    }
+};
+
 class ScheduledHistoryNavigation FINAL : public ScheduledNavigation {
 public:
     explicit ScheduledHistoryNavigation(int historySteps)
         : ScheduledNavigation(0, false, true)
         , m_historySteps(historySteps)
     {
     }
 
     virtual void fire(LocalFrame* frame) OVERRIDE
     {
@@ skipping 136 matching lines @@
             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, SecurityOrigin::urlWithUniqueSecurityOrigin(), referrer, false)));
+    const KURL& url = m_frame->document()->url();

[Nate Chapin, 2014/07/25 20:33:38]

Inline this?

+    schedule(adoptPtr(new ScheduledPageBlock(originDocument, url, referrer)));
 }
 
 void NavigationScheduler::scheduleFormSubmission(PassRefPtrWillBeRawPtr<FormSubmission> submission)
 {
     ASSERT(m_frame->page());
     schedule(adoptPtr(new ScheduledFormSubmission(submission, mustLockBackForwardList(m_frame))));
 }
 
 void NavigationScheduler::scheduleRefresh()
 {
@@ skipping 76 matching lines @@
 
 void NavigationScheduler::cancel()
 {
     if (m_timer.isActive())
         InspectorInstrumentation::frameClearedScheduledNavigation(m_frame);
     m_timer.stop();
     m_redirect.clear();
 }
 
 } // namespace blink