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

Source/core/html/imports/LinkImport.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 116 matching lines @@
     return m_owner;
 }
 
 bool LinkImport::hasLoaded() const
 {
     // Should never be called after importChildWasDestroyed was called.
     ASSERT(m_owner);
     return m_child && m_child->isDone() && !m_child->loader()->hasError();
 }
 
+void LinkImport::ownerInserted()
+{
+    if (m_child)
+        m_child->ownerInserted();
+}
+
 void LinkImport::trace(Visitor* visitor)
 {
     visitor->trace(m_child);
     HTMLImportChildClient::trace(visitor);
     LinkResource::trace(visitor);
 }
 
 } // namespace WebCore