Make WebFileSystemCallbacks not self-destruct, deprecate AsyncFileSystem

Source/modules/filesystem/DirectoryEntrySync.cpp

 /*
  * Copyright (C) 2010 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 37 matching lines @@
 }
 
 PassRefPtr<DirectoryReaderSync> DirectoryEntrySync::createReader()
 {
     return DirectoryReaderSync::create(m_fileSystem, m_fullPath);
 }
 
 PassRefPtr<FileEntrySync> DirectoryEntrySync::getFile(const String& path, const Dictionary& options, ExceptionState& es)
 {
     FileSystemFlags flags(options);
-    EntrySyncCallbackHelper helper(m_fileSystem->asyncFileSystem());
+    EntrySyncCallbackHelper helper;
     if (!m_fileSystem->getFile(this, path, flags, helper.successCallback(), helper.errorCallback(), DOMFileSystemBase::Synchronous)) {
         es.throwDOMException(InvalidModificationError, ExceptionMessages::failedToExecute("getFile", "DirectoryEntrySync"));
         return 0;
     }
     return static_pointer_cast<FileEntrySync>(helper.getResult(es));
 }
 
 PassRefPtr<DirectoryEntrySync> DirectoryEntrySync::getDirectory(const String& path, const Dictionary& options, ExceptionState& es)
 {
     FileSystemFlags flags(options);
-    EntrySyncCallbackHelper helper(m_fileSystem->asyncFileSystem());
+    EntrySyncCallbackHelper helper;
     if (!m_fileSystem->getDirectory(this, path, flags, helper.successCallback(), helper.errorCallback(), DOMFileSystemBase::Synchronous)) {
         es.throwDOMException(InvalidModificationError, ExceptionMessages::failedToExecute("getDirectory", "DirectoryEntrySync"));
         return 0;
     }
     return static_pointer_cast<DirectoryEntrySync>(helper.getResult(es));
 }
 
 void DirectoryEntrySync::removeRecursively(ExceptionState& es)
 {
-    VoidSyncCallbackHelper helper(m_fileSystem->asyncFileSystem());
+    VoidSyncCallbackHelper helper;
     if (!m_fileSystem->removeRecursively(this, helper.successCallback(), helper.errorCallback(), DOMFileSystemBase::Synchronous)) {
         es.throwDOMException(InvalidModificationError, ExceptionMessages::failedToExecute("removeRecursively", "DirectoryEntrySync"));
         return;
     }
     helper.getResult(es);
 }
 
 }