Testing a fix to crbug.com/456059.

Source/core/dom/ScriptRunner.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 100 matching lines @@
         scriptLoader->detach();
         m_document->decrementLoadEventDelayCount();
         break;
 
     case IN_ORDER_EXECUTION:
         ASSERT(!m_scriptsToExecuteInOrder.isEmpty());
         break;
     }
 }
 
+void ScriptRunner::movePendingAsyncScript(Document& oldDocument, Document& newDocument, ScriptLoader* scriptLoader)
+{
+    RefPtrWillBeRawPtr<Document> newContextDocument = newDocument.contextDocument().get();
+    if (!newContextDocument) {
+        // Document's contextDocument() method will return no Document if the
+        // following conditions both hold:
+        //
+        //   - The Document wasn't created with an explicit context document
+        //     and that document is otherwise kept alive.
+        //   - The Document itself is detached from its frame.
+        //
+        // The script element's loader is in that case moved to document() and
+        // its script runner, which is the non-null Document that contextDocument()
+        // would return if not detached.
+        ASSERT(!newDocument.frame());
+        newContextDocument = &newDocument;
+    }
+    RefPtrWillBeRawPtr<Document> oldContextDocument = oldDocument.contextDocument().get();
+    if (!oldContextDocument) {
+        ASSERT(!oldDocument.frame());
+        oldContextDocument = &oldDocument;
+    }
+    if (oldContextDocument != newContextDocument)
+        oldContextDocument->scriptRunner()->movePendingAsyncScript(newContextDocument->scriptRunner(), scriptLoader);
+}
+
 void ScriptRunner::movePendingAsyncScript(ScriptRunner* newRunner, ScriptLoader* scriptLoader)
 {
     if (m_pendingAsyncScripts.contains(scriptLoader)) {
         newRunner->addPendingAsyncScript(scriptLoader);
         m_pendingAsyncScripts.remove(scriptLoader);
         m_document->decrementLoadEventDelayCount();
     }
 }
 
 void ScriptRunner::timerFired(Timer<ScriptRunner>* timer)
@@ skipping 22 matching lines @@
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_document);
     visitor->trace(m_scriptsToExecuteInOrder);
     visitor->trace(m_scriptsToExecuteSoon);
     visitor->trace(m_pendingAsyncScripts);
 #endif
 }
 
 }