Revert of Make start/stop loading notifications per-frame

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 42 matching lines @@
 class DOMWrapperWorld;
 class DocumentLoader;
 class Event;
 class FetchContext;
 class FormState;
 class FormSubmission;
 class FrameLoaderClient;
 class IconController;
 class NavigationAction;
 class Page;
-class ProgressTracker;
 class ResourceError;
 class ResourceResponse;
 class SecurityOrigin;
 class SerializedScriptValue;
 class SubstituteData;
 
 struct FrameLoadRequest;
 struct WindowFeatures;
 
 bool isBackForwardLoadType(FrameLoadType);
 
 class FrameLoader {
     WTF_MAKE_NONCOPYABLE(FrameLoader);
 public:
     FrameLoader(LocalFrame*, FrameLoaderClient*);
     ~FrameLoader();
 
     void init();
 
     LocalFrame* frame() const { return m_frame; }
 
     MixedContentChecker* mixedContentChecker() const { return &m_mixedContentChecker; }
-    ProgressTracker& progress() const { return *m_progressTracker; }
 
     // These functions start a load. All eventually call into loadWithNavigationAction() or loadInSameDocument().
     void load(const FrameLoadRequest&); // The entry point for non-reload, non-history loads.
     void reload(ReloadPolicy = NormalReload, const KURL& overrideURL = KURL(), const AtomicString& overrideEncoding = nullAtom);
     void loadHistoryItem(HistoryItem*, HistoryLoadType = HistoryDifferentDocumentLoad, ResourceRequestCachePolicy = UseProtocolCachePolicy); // The entry point for all back/forward loads
 
     static void reportLocalLoadFailed(LocalFrame*, const String& url);
 
     // FIXME: These are all functions which stop loads. We have too many.
     // Warning: stopAllLoaders can and will detach the LocalFrame out from under you. All callers need to either protect the LocalFrame
     // or guarantee they won't in any way access the LocalFrame after stopAllLoaders returns.
     void stopAllLoaders();
     void stopLoading();
     bool closeURL();
     // FIXME: clear() is trying to do too many things. We should break it down into smaller functions.
     void clear();
 
     // Sets a timer to notify the client that the initial empty document has
     // been accessed, and thus it is no longer safe to show a provisional URL
     // above the document without risking a URL spoof.
     void didAccessInitialDocument();
 
     // If the initial empty document is showing and has been accessed, this
     // cancels the timer and immediately notifies the client in cases that
     // waiting to notify would allow a URL spoof.
     void notifyIfInitialDocumentAccessed();
 
     bool isLoading() const;
 
+    int numPendingOrLoadingRequests(bool recurse) const;
+
     DocumentLoader* documentLoader() const { return m_documentLoader.get(); }
     DocumentLoader* policyDocumentLoader() const { return m_policyDocumentLoader.get(); }
     DocumentLoader* provisionalDocumentLoader() const { return m_provisionalDocumentLoader.get(); }
     FrameState state() const { return m_state; }
     FetchContext& fetchContext() const { return *m_fetchContext; }
 
     void receivedMainResourceError(const ResourceError&);
 
     bool isLoadingMainFrame() const;
 
@@ skipping 105 matching lines @@
 
     LocalFrame* m_frame;
     FrameLoaderClient* m_client;
 
     // FIXME: These should be OwnPtr<T> to reduce build times and simplify
     // header dependencies unless performance testing proves otherwise.
     // Some of these could be lazily created for memory savings on devices.
     mutable FrameLoaderStateMachine m_stateMachine;
     mutable MixedContentChecker m_mixedContentChecker;
 
-    OwnPtr<ProgressTracker> m_progressTracker;
+    class FrameProgressTracker;
+    OwnPtr<FrameProgressTracker> m_progressTracker;
 
     FrameState m_state;
     FrameLoadType m_loadType;
 
     // Document loaders for the three phases of frame loading. Note that while
     // a new request is being loaded, the old document loader may still be referenced.
     // E.g. while a new request is in the "policy" state, the old document loader may
     // be consulted in particular as it makes sense to imply certain settings on the new loader.
     RefPtr<DocumentLoader> m_documentLoader;
     RefPtr<DocumentLoader> m_provisionalDocumentLoader;
@@ skipping 30 matching lines @@
 
     bool m_didAccessInitialDocument;
     Timer<FrameLoader> m_didAccessInitialDocumentTimer;
 
     SandboxFlags m_forcedSandboxFlags;
 };
 
 } // namespace WebCore
 
 #endif // FrameLoader_h