Fix userVisibility for files in ChromeOS filesystems.

Source/modules/filesystem/DOMFileSystemSync.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 106 matching lines @@
     {
     }
 
     virtual void didCreateSnapshotFile(const FileMetadata& metadata, PassRefPtr<BlobDataHandle> snapshot) OVERRIDE
     {
         // We can't directly use the snapshot blob data handle because the content type on it hasn't been set.
         // The |snapshot| param is here to provide a a chain of custody thru thread bridging that is held onto until
         // *after* we've coined a File with a new handle that has the correct type set on it. This allows the
         // blob storage system to track when a temp file can and can't be safely deleted.
 
-        // For regular filesystem types (temporary or persistent), we should not cache file metadata as it could change File semantics.
-        // For other filesystem types (which could be platform-specific ones), there's a chance that the files are on remote filesystem.
-        // If the port has returned metadata just pass it to File constructor (so we may cache the metadata).
-        // FIXME: We should use the snapshot metadata for all files.
-        // https://www.w3.org/Bugs/Public/show_bug.cgi?id=17746
-        if (m_type == FileSystemTypeTemporary || m_type == FileSystemTypePersistent) {
-            m_result->m_file = File::createForFileSystemFile(metadata.platformPath, m_name);
-        } else if (!metadata.platformPath.isEmpty()) {
-            // If the platformPath in the returned metadata is given, we create a File object for the path.
-            m_result->m_file = File::createForFileSystemFile(m_name, metadata).get();
-        } else {
-            // Otherwise create a File from the FileSystem URL.
-            m_result->m_file = File::createForFileSystemFile(m_url, metadata).get();
-        }
+        m_result->m_file = DOMFileSystemBase::createFile(metadata, m_url, m_type, m_name);
     }
 
     virtual bool shouldBlockUntilCompletion() const OVERRIDE
     {
         return true;
     }
 
 private:
     CreateFileHelper(CreateFileResult* result, const String& name, const KURL& url, FileSystemType type)
         : m_result(result)
@@ skipping 80 matching lines @@
 
     fileSystem()->createFileWriter(createFileSystemURL(fileEntry), fileWriter, callbacks.release());
     if (errorCode != FileError::OK) {
         FileError::throwDOMException(exceptionState, errorCode);
         return 0;
     }
     return fileWriter;
 }
 
 }