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 1023 matching lines @@
     } else {
         view->setScrollPositionNonProgrammatically(m_currentItem->scrollPoint());
     }
 
     if (m_frame->isMainFrame()) {
         if (ScrollingCoordinator* scrollingCoordinator = m_frame->page()->scrollingCoordinator())
             scrollingCoordinator->frameViewRootLayerDidChange(view);
     }
 }
 
+bool FrameLoader::documentResourceRequestFromCurrentHistoryItemForInspector(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 (LocalFrame* child = m_frame->tree().lastChild(); child; child = child->tree().previousSibling())
         childrenToDetach.append(child);
     FrameVector::iterator end = childrenToDetach.end();
     for (FrameVector::iterator it = childrenToDetach.begin(); it != end; ++it)
         (*it)->loader().detachFromParent();
@@ skipping 382 matching lines @@
 {
     SandboxFlags flags = m_forcedSandboxFlags;
     if (LocalFrame* parentFrame = m_frame->tree().parent())
         flags |= parentFrame->document()->sandboxFlags();
     if (HTMLFrameOwnerElement* ownerElement = m_frame->ownerElement())
         flags |= ownerElement->sandboxFlags();
     return flags;
 }
 
 } // namespace WebCore