Refactor the API for setting dynamic resource load priorities

Source/core/fetch/ResourceFetcher.h

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
@@ skipping 92 matching lines @@
     void addAllArchiveResources(MHTMLArchive*);
     ArchiveResourceCollection* archiveResourceCollection() const { return m_archiveResourceCollection.get(); }
 
     void setDefersLoading(bool);
     void stopFetching();
     bool isFetching() const;
 
     void didLoadResource();
     void redirectReceived(Resource*, const ResourceResponse&);
     void didFinishLoading(Resource*, double finishTime, int64_t encodedDataLength);
-    void didChangeLoadingPriority(const Resource*, ResourceLoadPriority, int intraPriorityValue);
     void didFailLoading(const Resource*, const ResourceError&);
     void willSendRequest(unsigned long identifier, ResourceRequest&, const ResourceResponse& redirectResponse, const FetchInitiatorInfo&);
     void didReceiveResponse(const Resource*, const ResourceResponse&);
     void didReceiveData(const Resource*, const char* data, int dataLength, int encodedDataLength);
     void didDownloadData(const Resource*, int dataLength, int encodedDataLength);
     void subresourceLoaderFinishedLoadingOnePart(ResourceLoader*);
     void didInitializeResourceLoader(ResourceLoader*);
     void willStartLoadingResource(Resource*, ResourceRequest&);
     bool defersLoading() const;
     bool isLoadedBy(ResourceFetcher*) const;
 
     enum AccessControlLoggingDecision {
         ShouldLogAccessControlErrors,
         ShouldNotLogAccessControlErrors
     };
     bool canAccessRedirect(Resource*, ResourceRequest&, const ResourceResponse&, ResourceLoaderOptions&);
     bool canAccessResource(Resource*, SecurityOrigin*, const KURL&, AccessControlLoggingDecision) const;
     bool isControlledByServiceWorker() const;
 
     void acceptDataFromThreadedReceiver(unsigned long identifier, const char* data, int dataLength, int encodedDataLength);
 
-    ResourceLoadPriority loadPriority(Resource::Type, const FetchRequest&);
+    ResourceLoadPriority loadPriority(Resource::Type, const FetchRequest&, ResourcePriority::VisibilityStatus = ResourcePriority::NotVisible);
 
     enum ResourceLoadStartType {
         ResourceLoadingFromNetwork,
         ResourceLoadingFromCache
     };
     void requestLoadStarted(Resource*, const FetchRequest&, ResourceLoadStartType, bool isStaticData = false);
     static const ResourceLoaderOptions& defaultResourceOptions();
 
     String getCacheIdentifier() const;
 
     void scheduleDocumentResourcesGC();
     bool clientDefersImage(const KURL&) const;
     void determineRequestContext(ResourceRequest&, Resource::Type);
 
+    void updateAllImageResourcePriorities();
+
 private:
     friend class ResourceCacheValidationSuppressor;
 
     explicit ResourceFetcher(FetchContext*);
 
     ResourcePtr<Resource> createResourceForRevalidation(const FetchRequest&, Resource*, const ResourceFactory&);
     ResourcePtr<Resource> createResourceForLoading(FetchRequest&, const String& charset, const ResourceFactory&);
     void storeResourceTimingInitiatorInformation(Resource*);
     bool scheduleArchiveLoad(Resource*, const ResourceRequest&);
     void preCacheData(const FetchRequest&, const ResourceFactory&, const SubstituteData&);
@@ skipping 82 matching lines @@
             m_loader->m_allowStaleResources = m_previousState;
     }
 private:
     Member<ResourceFetcher> m_loader;
     bool m_previousState;
 };
 
 } // namespace blink
 
 #endif // ResourceFetcher_h