Revert "Close FileChannels in UpdateHandler#copyFile."

        } else {

            try {

                final FileChannel sourceChannel = ((FileInputStream) in).getChannel();

                try {

                final FileChannel destinationChannel = ((FileOutputStream) out).getChannel();

                    try {

                sourceChannel.transferTo(0, Integer.MAX_VALUE, destinationChannel);

                    } finally {

                        destinationChannel.close();

                    }

                } finally {

                    sourceChannel.close();

                }

            } catch (IOException e) {

                // Can't work with channels, or something went wrong. Copy by hand.

                DebugLogUtils.l("Won't work");