HTML Imports: styles in removed imports should be applied when it comes back

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 47 matching lines @@
 {
 #if !ENABLE(OILPAN)
     // importDestroyed() should be called before the destruction.
     ASSERT(!m_loader);
 
     if (m_client)
         m_client->importChildWasDestroyed(this);
 #endif
 }
 
+void HTMLImportChild::ownerInserted()
+{
+    if (!m_loader->isDone())
+        return;
+    root()->document()->styleResolverChanged();
+}
+
 void HTMLImportChild::didShareLoader()
 {
     createCustomElementMicrotaskStepIfNeeded();
     stateWillChange();
 }
 
 void HTMLImportChild::didStartLoading()
 {
     createCustomElementMicrotaskStepIfNeeded();
 }
@@ skipping 142 matching lines @@
 
 void HTMLImportChild::trace(Visitor* visitor)
 {
     visitor->trace(m_customElementMicrotaskStep);
     visitor->trace(m_loader);
     visitor->trace(m_client);
     HTMLImport::trace(visitor);
 }
 
 } // namespace WebCore