Merge 174141 "HTML Imports: Take care of cycles according to the..."

Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp

 /*
  * Copyright (C) 2013 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 37 matching lines @@
     : m_import(import->weakPtr())
     , m_queue(import->loader()->microtaskQueue())
     , m_weakFactory(this)
 {
 }
 
 CustomElementMicrotaskImportStep::~CustomElementMicrotaskImportStep()
 {
 }
 
+void CustomElementMicrotaskImportStep::parentWasChanged()
+{
+    m_queue = CustomElementMicrotaskQueue::create();
+    m_import.clear();
+}
+
 bool CustomElementMicrotaskImportStep::shouldWaitForImport() const
 {
     return m_import && !m_import->isLoaded();
 }
 
 bool CustomElementMicrotaskImportStep::shouldStopProcessing() const
 {
     return m_import && m_import->isSync();
 }
 
@@ skipping 19 matching lines @@
 
 #if !defined(NDEBUG)
 void CustomElementMicrotaskImportStep::show(unsigned indent)
 {
     fprintf(stderr, "%*sImport(wait=%d sync=%d, url=%s)\n", indent, "", shouldWaitForImport(), shouldStopProcessing(), m_import ? m_import->url().string().utf8().data() : "null");
     m_queue->show(indent + 1);
 }
 #endif
 
 } // namespace WebCore