[Refactring] Turn HTMLImport::m_sync from bool to an enum.

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 21 matching lines @@
 #include "core/html/imports/HTMLImportChild.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/custom/CustomElement.h"
 #include "core/dom/custom/CustomElementMicrotaskImportStep.h"
 #include "core/html/imports/HTMLImportChildClient.h"
 #include "core/html/imports/HTMLImportLoader.h"
 
 namespace WebCore {
 
-HTMLImportChild::HTMLImportChild(Document& master, const KURL& url, bool sync)
+HTMLImportChild::HTMLImportChild(Document& master, const KURL& url, SyncMode sync)
     : HTMLImport(sync)
     , m_master(master)
     , m_url(url)
     , m_customElementMicrotaskStep(0)
     , m_client(0)
 {
     m_master.guardRef();
 }
 
 HTMLImportChild::~HTMLImportChild()
@@ skipping 195 matching lines @@
     HTMLImport::showThis();
     fprintf(stderr, " loader=%p own=%s async=%s url=%s",
         m_loader.get(),
         hasLoader() && ownsLoader() ? "Y" : "N",
         isSync() ? "Y" : "N",
         url().string().utf8().data());
 }
 #endif
 
 } // namespace WebCore