DevTools: Load document (html) content from disk cache in page agent enabling.

Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 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) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 1041 matching lines @@
     } else {
         view->setScrollPositionNonProgrammatically(m_currentItem->scrollPoint());
     }
 
     if (m_frame->isMainFrame()) {
         if (ScrollingCoordinator* scrollingCoordinator = m_frame->page()->scrollingCoordinator())
             scrollingCoordinator->frameViewRootLayerDidChange(view);
     }
 }
 
+bool FrameLoader::requestFromHistoryForInspector(ResourceRequestCachePolicy cachePolicy, ResourceRequest* request)
+{
+    if (!m_currentItem)
+        return false;
+    *request = requestFromHistoryItem(m_currentItem.get(), cachePolicy);
+    return true;
+}
+
 void FrameLoader::detachChildren()
 {
     typedef Vector<RefPtr<LocalFrame> > FrameVector;
     FrameVector childrenToDetach;
     childrenToDetach.reserveCapacity(m_frame->tree().childCount());
     for (Frame* child = m_frame->tree().lastChild(); child; child = child->tree().previousSibling()) {
         if (child->isLocalFrame())
             childrenToDetach.append(toLocalFrame(child));
     }
     FrameVector::iterator end = childrenToDetach.end();
@@ skipping 402 matching lines @@
     // FIXME: We need a way to propagate sandbox flags to out-of-process frames.
     Frame* parentFrame = m_frame->tree().parent();
     if (parentFrame && parentFrame->isLocalFrame())
         flags |= toLocalFrame(parentFrame)->document()->sandboxFlags();
     if (FrameOwner* frameOwner = m_frame->owner())
         flags |= frameOwner->sandboxFlags();
     return flags;
 }
 
 } // namespace WebCore