Refactoring starting a resource load

third_party/WebKit/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 62 matching lines @@
     virtual ~ResourceFetcher();
     DECLARE_VIRTUAL_TRACE();
 
     Resource* requestResource(FetchRequest&, const ResourceFactory&, const SubstituteData& = SubstituteData());
 
     Resource* cachedResource(const KURL&) const;
 
     using DocumentResourceMap = HeapHashMap<String, WeakMember<Resource>>;
     const DocumentResourceMap& allResources() const { return m_documentResources; }
 
+    // Actually starts loading a Resource if it wasn't started during requestResource().
+    bool startLoad(Resource*);
+
     void setAutoLoadImages(bool);
     void setImagesEnabled(bool);
 
     FetchContext& context() const { return m_context ? *m_context.get() : FetchContext::nullInstance(); }
     void clearContext() { m_context.clear(); }
 
     int requestCount() const;
 
     enum ClearPreloadsPolicy { ClearAllPreloads, ClearSpeculativeMarkupPreloads };
 
@@ skipping 10 matching lines @@
     void stopFetching();
     bool isFetching() const;
 
     void didLoadResource(Resource*);
     bool willFollowRedirect(Resource*, ResourceRequest&, const ResourceResponse&);
     void didFinishLoading(Resource*, double finishTime, int64_t encodedDataLength);
     void didFailLoading(const Resource*, const ResourceError&);
     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 willStartLoadingResource(Resource*, ResourceLoader*, ResourceRequest&);
     bool defersLoading() const;
 
     void moveResourceLoaderToNonBlocking(ResourceLoader*);
     void removeResourceLoader(ResourceLoader*);
 
     enum AccessControlLoggingDecision {
         ShouldLogAccessControlErrors,
         ShouldNotLogAccessControlErrors
     };
     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&, ResourcePriority::VisibilityStatus = ResourcePriority::NotVisible);
 
     enum ResourceLoadStartType {
         ResourceLoadingFromNetwork,
         ResourceLoadingFromCache
     };
     void requestLoadStarted(Resource*, const FetchRequest&, ResourceLoadStartType, bool isStaticData = false);
     static const ResourceLoaderOptions& defaultResourceOptions();
 
     String getCacheIdentifier() const;
 
     static void determineRequestContext(ResourceRequest&, Resource::Type, bool isMainFrame);
     void determineRequestContext(ResourceRequest&, Resource::Type);
 
-    WebTaskRunner* loadingTaskRunner();
-
     void updateAllImageResourcePriorities();
 
     void reloadLoFiImages();
 
     // This is only exposed for testing purposes.
     HeapListHashSet<Member<Resource>>* preloads() { return m_preloads.get(); }
 
 private:
     friend class ResourceCacheValidationSuppressor;
 
     explicit ResourceFetcher(FetchContext*);
 
     void initializeRevalidation(const FetchRequest&, Resource*);
     Resource* createResourceForLoading(FetchRequest&, const String& charset, const ResourceFactory&);
     void storeResourceTimingInitiatorInformation(Resource*);
 
     Resource* resourceForStaticData(const FetchRequest&, const ResourceFactory&, const SubstituteData&);
 
     // RevalidationPolicy enum values are used in UMAs https://crbug.com/579496.
     enum RevalidationPolicy { Use, Revalidate, Reload, Load };
     RevalidationPolicy determineRevalidationPolicy(Resource::Type, const FetchRequest&, Resource* existingResource, bool isStaticData) const;
 
     void moveCachedNonBlockingResourceToBlocking(Resource*, const FetchRequest&);
 
     void initializeResourceRequest(ResourceRequest&, Resource::Type, FetchRequest::DeferOption);
+    void willStartLoadingResource(Resource*, ResourceLoader*, ResourceRequest&);
 
     bool resourceNeedsLoad(Resource*, const FetchRequest&, RevalidationPolicy);
     bool shouldDeferImageLoad(const KURL&) const;
 
     void resourceTimingReportTimerFired(Timer<ResourceFetcher>*);
 
     void reloadImagesIfNotDeferred();
 
     void updateMemoryCacheStats(Resource*, RevalidationPolicy, const FetchRequest&,  const ResourceFactory&, bool isStaticData) const;
 
@@ skipping 56 matching lines @@
             m_loader->m_allowStaleResources = m_previousState;
     }
 private:
     Member<ResourceFetcher> m_loader;
     bool m_previousState;
 };
 
 } // namespace blink
 
 #endif // ResourceFetcher_h