Make internals.isPreloaded() to remain the same before/after clearPreloads()

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 76 matching lines @@
     void setImagesEnabled(bool);
 
     FetchContext& context() const { return m_context ? *m_context.get() : FetchContext::nullInstance(); }
     void clearContext();
 
     int requestCount() const;
     bool hasPendingRequest() const;
 
     enum ClearPreloadsPolicy { ClearAllPreloads, ClearSpeculativeMarkupPreloads };
 
-    bool isPreloaded(const KURL&) const;
+    void enableIsPreloadedForTest();
+    bool isPreloadedForTest(const KURL&) const;
+
     int countPreloads() const { return m_preloads ? m_preloads->size() : 0; }
     void clearPreloads(ClearPreloadsPolicy = ClearAllPreloads);
     void preloadStarted(Resource*);
     void logPreloadStats();
 
     MHTMLArchive* archive() const { return m_archive.get(); }
     ArchiveResource* createArchive(Resource*);
 
     void setDefersLoading(bool);
     void stopFetching();
@@ skipping 93 matching lines @@
 
         void update(RevalidationPolicy);
 
     private:
         int m_useCount;
         int m_revalidateCount;
         int m_loadCount;
     };
     DeadResourceStatsRecorder m_deadStatsRecorder;
 
+    std::unique_ptr<HashSet<String>> m_preloadedURLsForTest;
+
     // 28 bits left
     bool m_autoLoadImages : 1;
     bool m_imagesEnabled : 1;
     bool m_allowStaleResources : 1;
     bool m_imageFetched : 1;
 };
 
 class ResourceCacheValidationSuppressor {
     WTF_MAKE_NONCOPYABLE(ResourceCacheValidationSuppressor);
     STACK_ALLOCATED();
@@ skipping 13 matching lines @@
             m_loader->m_allowStaleResources = m_previousState;
     }
 private:
     Member<ResourceFetcher> m_loader;
     bool m_previousState;
 };
 
 } // namespace blink
 
 #endif // ResourceFetcher_h