Make ScriptLoader into a ResourceOwner

Source/core/xml/parser/XMLDocumentParser.cpp

 /*
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Holger Hans Peter Freyther
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1018 matching lines @@
     ScriptLoader* scriptLoader = toScriptLoaderIfPossible(element);
     if (!scriptLoader) {
         popCurrentNode();
         return;
     }
 
     // Don't load external scripts for standalone documents (for now).
     ASSERT(!m_pendingScript);
     m_requestingScript = true;
 
-    if (scriptLoader->prepareScript(m_scriptStartPosition, ScriptLoader::AllowLegacyTypeInTypeAttribute)) {
+    ScriptPrep prep = scriptLoader->prepareScript(m_scriptStartPosition, ScriptLoader::AllowLegacyTypeInTypeAttribute);
+    if (prep.succeeded()) {
         // FIXME: Script execution should be shared between
         // the libxml2 and Qt XMLDocumentParser implementations.
 
         if (scriptLoader->readyToBeParserExecuted()) {
             scriptLoader->executeScript(ScriptSourceCode(scriptLoader->scriptContent(), document()->url(), m_scriptStartPosition));
         } else if (scriptLoader->willBeParserExecuted()) {
-            m_pendingScript = scriptLoader->resource();
+            m_pendingScript = prep.resource();
             m_scriptElement = element;
             m_pendingScript->addClient(this);
 
             // m_pendingScript will be 0 if script was already loaded and addClient() executed it.
             if (m_pendingScript)
                 pauseParsing();
         } else {
             m_scriptElement = nullptr;
         }
 
@@ skipping 539 matching lines @@
     sax.initialized = XML_SAX2_MAGIC;
     RefPtr<XMLParserContext> parser = XMLParserContext::createStringParser(&sax, &state);
     String parseString = "<?xml version=\"1.0\"?><attrs " + string + " />";
     parseChunk(parser->context(), parseString);
     finishParsing(parser->context());
     attrsOK = state.gotAttributes;
     return state.attributes;
 }
 
 } // namespace WebCore