Refactoring: Get rid of HTMLImportRoot.

Source/core/html/imports/HTMLImportChild.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 114 matching lines @@
 void HTMLImportChild::importDestroyed()
 {
     if (parent())
         parent()->removeChild(this);
     if (m_loader) {
         m_loader->removeImport(this);
         m_loader = 0;
     }
 }
 
-HTMLImportRoot* HTMLImportChild::root()
-{
-    return parent() ? parent()->root() : 0;
-}
-
 Document* HTMLImportChild::document() const
 {
     return (m_loader && m_loader->isOwnedBy(this)) ? m_loader->document() : 0;
 }
 
+void HTMLImportChild::stateWillChange()
+{
+    toHTMLImportsController(root())->scheduleRecalcState();
+}
+
 void HTMLImportChild::stateDidChange()
 {
     HTMLImport::stateDidChange();
 
     // Once all preceding imports are loaded,
     // HTMLImportChild can decide whether it should load the import by itself
     // or it can share existing one.
     if (!state().shouldBlockDocumentCreation())
         ensureLoader();
     if (state().isReady())
         didFinish();
 }
 
 void HTMLImportChild::ensureLoader()
 {
     if (m_loader)
         return;
 
-    if (HTMLImportChild* found = root()->findLinkFor(m_url, this))
+    if (HTMLImportChild* found = toHTMLImportsController(root())->findLinkFor(m_url, this))
         shareLoader(found);
     else
         createLoader();
 }
 
 void HTMLImportChild::createLoader()
 {
     ASSERT(!state().shouldBlockDocumentCreation());
     ASSERT(!m_loader);
-    m_loader = root()->toController()->createLoader();
+    m_loader = toHTMLImportsController(root())->createLoader();
     m_loader->addImport(this);
     m_loader->startLoading(resource());
 }
 
 void HTMLImportChild::shareLoader(HTMLImportChild* loader)
 {
     ASSERT(!m_loader);
     m_loader = loader->m_loader;
     m_loader->addImport(this);
     stateWillChange();
@@ skipping 47 matching lines @@
     HTMLImport::showThis();
     fprintf(stderr, " loader=%p own=%s async=%s url=%s",
         m_loader,
         hasLoader() && ownsLoader() ? "Y" : "N",
         isSync() ? "Y" : "N",
         url().string().utf8().data());
 }
 #endif
 
 } // namespace WebCore