Revert of Script blocking resources tracking should be only done by Document::isScriptExecutionReady

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

 /*
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 46 matching lines @@
   }
   ~HTMLScriptRunner();
 
   void detach();
 
   // Processes the passed in script and any pending scripts if possible.
   void execute(Element* scriptToProcess,
                const TextPosition& scriptStartPosition);
 
   void executeScriptsWaitingForLoad(Resource*);
+  bool hasScriptsWaitingForResources() const {
+    return m_hasScriptsWaitingForResources;
+  }
   void executeScriptsWaitingForResources();
   bool executeScriptsWaitingForParsing();
 
   bool hasParserBlockingScript() const;
   bool isExecutingScript() const {
     return !!m_reentryPermit->scriptNestingLevel();
   }
 
   // ResourceClient
   void notifyFinished(Resource*) override;
   String debugName() const override { return "HTMLScriptRunner"; }
 
   DECLARE_TRACE();
 
  private:
   HTMLScriptRunner(HTMLParserReentryPermit*, Document*, HTMLScriptRunnerHost*);
 
   void executeParsingBlockingScript();
   void executePendingScriptAndDispatchEvent(PendingScript*,
                                             ScriptStreamer::Type);
   void executeParsingBlockingScripts();
 
   void requestParsingBlockingScript(Element*);
   void requestDeferredScript(Element*);
   bool requestPendingScript(PendingScript*, Element*) const;
 
   void runScript(Element*, const TextPosition& scriptStartPosition);
 
-  bool isPendingScriptReady();
+  bool isPendingScriptReady(const PendingScript*);
 
   void stopWatchingResourceForLoad(Resource*);
 
   void possiblyFetchBlockedDocWriteScript(Resource*);
 
   RefPtr<HTMLParserReentryPermit> m_reentryPermit;
   Member<Document> m_document;
   Member<HTMLScriptRunnerHost> m_host;
   Member<PendingScript> m_parserBlockingScript;
   // http://www.whatwg.org/specs/web-apps/current-work/#list-of-scripts-that-will-execute-when-the-document-has-finished-parsing
   HeapDeque<Member<PendingScript>> m_scriptsToExecuteAfterParsing;
+
+  // We only want stylesheet loads to trigger script execution if script
+  // execution is currently stopped due to stylesheet loads, otherwise we'd
+  // cause nested script execution when parsing <style> tags since </style>
+  // tags can cause Document to call executeScriptsWaitingForResources.
+  bool m_hasScriptsWaitingForResources;
 };
 
 }  // namespace blink
 
 #endif