Make WebFileSystemCallbacks not self-destruct, deprecate AsyncFileSystem

Source/modules/filesystem/DataTransferItemFileSystem.cpp

 /*
  * Copyright (C) 2012 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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "modules/filesystem/DataTransferItemFileSystem.h"
 
 #include "core/dom/ScriptExecutionContext.h"
 #include "core/fileapi/File.h"
-#include "core/platform/AsyncFileSystem.h"
 #include "core/platform/AsyncFileSystemCallbacks.h"
 #include "core/platform/FileMetadata.h"
 #include "core/platform/FileSystem.h"
 #include "core/platform/chromium/ChromiumDataObject.h"
 #include "core/platform/chromium/ClipboardChromium.h"
 #include "modules/filesystem/DOMFilePath.h"
 #include "modules/filesystem/DOMFileSystem.h"
 #include "modules/filesystem/DirectoryEntry.h"
 #include "modules/filesystem/DraggedIsolatedFileSystem.h"
 #include "modules/filesystem/Entry.h"
@@ skipping 32 matching lines @@
     FileMetadata metadata;
     if (!getFileMetadata(toFile(file)->path(), metadata))
         return adoptRef(static_cast<Entry*>(0));
 
     if (metadata.type == FileMetadata::TypeDirectory)
         return static_cast<Entry*>(DirectoryEntry::create(domFileSystem, virtualPath).get());
     return static_cast<Entry*>(FileEntry::create(domFileSystem, virtualPath).get());
 }
 
 } // namespace WebCore