Cache-aware Resource loading

third_party/WebKit/Source/core/fetch/ResourceLoader.h

 /*
  * Copyright (C) 2005, 2006, 2011 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 37 matching lines @@
       protected WebURLLoaderClient {
  public:
   static ResourceLoader* create(ResourceFetcher*, Resource*);
   ~ResourceLoader() override;
   DECLARE_TRACE();
 
   void start(const ResourceRequest&,
              WebTaskRunner* loadingTaskRunner,
              bool defersLoading);
 
-  // This method is currently only used for service worker fallback request,
-  // other users should be careful not to break ResourceLoader state.
+  // This method is currently only used for service worker fallback request and
+  // cache-aware loading, other users should be careful not to break
+  // ResourceLoader state.
   void restart(const ResourceRequest&,
                WebTaskRunner* loadingTaskRunner,
                bool defersLoading);
 
   void cancel();
 
   void setDefersLoading(bool);
 
   void didChangePriority(ResourceLoadPriority, int intraPriorityValue);
 
+  // Called before start() to activate cache-aware loading if enabled in
+  // |m_resource->options()| and applicable.
+  void activateCacheAwareLoadingIfNeeded(const ResourceRequest&);
+
+  bool isCacheAwareLoadingActivated() const {
+    return m_isCacheAwareLoadingActivated;
+  }
+
   // WebURLLoaderClient
   //
   // A succesful load will consist of:
   // 0+  willFollowRedirect()
   // 0+  didSendData()
   // 1   didReceiveResponse()
   // 0-1 didReceiveCachedMetadata()
   // 0+  didReceiveData() or didDownloadData(), but never both
   // 1   didFinishLoading()
   // A failed load is indicated by 1 didFail(), which can occur at any time
@@ skipping 29 matching lines @@
  private:
   // Assumes ResourceFetcher and Resource are non-null.
   ResourceLoader(ResourceFetcher*, Resource*);
 
   void cancelForRedirectAccessCheckError(const KURL&);
   void requestSynchronously(const ResourceRequest&);
 
   std::unique_ptr<WebURLLoader> m_loader;
   Member<ResourceFetcher> m_fetcher;
   Member<Resource> m_resource;
+  bool m_isCacheAwareLoadingActivated;
 };
 
 }  // namespace blink
 
 #endif