Prerender: Disable prefetch if there's an appcache.

third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2010 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:
  * 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 52 matching lines @@
 
   static std::unique_ptr<CachedDocumentParameters> create() {
     return WTF::wrapUnique(new CachedDocumentParameters);
   }
 
   bool doHtmlPreloadScanning;
   bool doDocumentWritePreloadScanning;
   Length defaultViewportMinWidth;
   bool viewportMetaZeroValuesQuirk;
   bool viewportMetaEnabled;
+  bool isPrefetchOnly;
   ReferrerPolicy referrerPolicy;
 
  private:
   explicit CachedDocumentParameters(Document*);
   CachedDocumentParameters() = default;
 };
 
 class TokenPreloadScanner {
   WTF_MAKE_NONCOPYABLE(TokenPreloadScanner);
   USING_FAST_MALLOC(TokenPreloadScanner);
@@ skipping 41 matching lines @@
                          bool* isCSPMetaTag,
                          bool* likelyDocumentWriteScript);
 
   template <typename Token>
   void updatePredictedBaseURL(const Token&);
 
   struct Checkpoint {
     Checkpoint(const KURL& predictedBaseElementURL,
                bool inStyle,
                bool inScript,
+               bool isAppCacheEnabled,
                size_t templateCount)
         : predictedBaseElementURL(predictedBaseElementURL),
           inStyle(inStyle),
           inScript(inScript),
+          isAppCacheEnabled(isAppCacheEnabled),
           templateCount(templateCount) {}
 
     KURL predictedBaseElementURL;
     bool inStyle;
     bool inScript;
+    bool isAppCacheEnabled;
     size_t templateCount;
   };
 
   struct PictureData {
     PictureData() : sourceSize(0.0), sourceSizeSet(false), picked(false) {}
     String sourceURL;
     float sourceSize;
     bool sourceSizeSet;
     bool picked;
   };
 
   CSSPreloadScanner m_cssScanner;
   const KURL m_documentURL;
   KURL m_predictedBaseElementURL;
   bool m_inStyle;
   bool m_inPicture;
   bool m_inScript;
+  bool m_isAppCacheEnabled;
   PictureData m_pictureData;
   size_t m_templateCount;
   std::unique_ptr<CachedDocumentParameters> m_documentParameters;
   Persistent<MediaValuesCached> m_mediaValues;
   ClientHintsPreferences m_clientHintsPreferences;
 
   bool m_didRewind = false;
 
   Vector<Checkpoint> m_checkpoints;
 };
@@ skipping 27 matching lines @@
 
   TokenPreloadScanner m_scanner;
   SegmentedString m_source;
   HTMLToken m_token;
   std::unique_ptr<HTMLTokenizer> m_tokenizer;
 };
 
 }  // namespace blink
 
 #endif