Reland: Refactor Script(Loader|Runner): don't access Resources all over the place...

Source/core/html/parser/HTMLScriptRunner.cpp

 /*
  * 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 56 matching lines @@
     ASSERT(!m_document);
 #endif
 }
 
 void HTMLScriptRunner::detach()
 {
     if (!m_document)
         return;
 
     m_parserBlockingScript.stopWatchingForLoad(this);
+    m_parserBlockingScript.releaseElementAndClear();
 
     while (!m_scriptsToExecuteAfterParsing.isEmpty()) {
         PendingScript pendingScript = m_scriptsToExecuteAfterParsing.takeFirst();
         pendingScript.stopWatchingForLoad(this);
+        pendingScript.releaseElementAndClear();
     }
     m_document = nullptr;
 }
 
 static KURL documentURLForScriptExecution(Document* document)
 {
     if (!document)
         return KURL();
 
     if (!document->frame()) {
@@ skipping 249 matching lines @@
 
 void HTMLScriptRunner::trace(Visitor* visitor)
 {
     visitor->trace(m_document);
     visitor->trace(m_host);
     visitor->trace(m_parserBlockingScript);
     visitor->trace(m_scriptsToExecuteAfterParsing);
 }
 
 }