Clean up ShadowRootRareData, ShadowRoot and SlotAssignment

third_party/WebKit/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 65 matching lines @@
 
 void HTMLImportChild::didFinish()
 {
     if (m_client)
         m_client->didFinish();
 }
 
 void HTMLImportChild::didFinishLoading()
 {
     stateWillChange();
-    if (document() && document()->styleSheets()->length() > 0)
+    if (document() && document()->styleSheets().length() > 0)
         UseCounter::count(root()->document(), UseCounter::HTMLImportsHasStyleSheets);
     V0CustomElement::didFinishLoadingImport(*(root()->document()));
 }
 
 void HTMLImportChild::didFinishUpgradingCustomElements()
 {
     stateWillChange();
     m_customElementMicrotaskStep.clear();
 }
 
@@ skipping 111 matching lines @@
 
 DEFINE_TRACE(HTMLImportChild)
 {
     visitor->trace(m_customElementMicrotaskStep);
     visitor->trace(m_loader);
     visitor->trace(m_client);
     HTMLImport::trace(visitor);
 }
 
 } // namespace blink