DevTools: Preload HTML documents content before fetching resource content.

Source/core/loader/FrameLoader.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Google Inc. 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 57 matching lines @@
 class SubstituteData;
 
 struct FrameLoadRequest;
 struct WindowFeatures;
 
 bool isBackForwardLoadType(FrameLoadType);
 
 class FrameLoader {
     WTF_MAKE_NONCOPYABLE(FrameLoader);
 public:
+    static ResourceRequest requestFromHistoryItem(HistoryItem*, ResourceRequestCachePolicy);
+
     FrameLoader(LocalFrame*);
     ~FrameLoader();
 
     void init();
 
     LocalFrame* frame() const { return m_frame; }
 
     MixedContentChecker* mixedContentChecker() const { return &m_mixedContentChecker; }
     ProgressTracker& progress() const { return *m_progressTracker; }
 
@@ skipping 189 matching lines @@
     Timer<FrameLoader> m_didAccessInitialDocumentTimer;
 
     SandboxFlags m_forcedSandboxFlags;
 
     bool m_willDetachClient;
 };
 
 } // namespace WebCore
 
 #endif // FrameLoader_h