am bcf76242: Merge "Move FLATTENED_PATTERN to inner class."

    public int right;

    public int bottom;

    /**

     * A helper class for flattened rectange pattern recognition. A separate

     * class to avoid an initialization dependency on a regular expression

     * causing Rect to not be initializable with an ahead-of-time compilation

     * scheme.

     */

    private static final class UnflattenHelper {

        private static final Pattern FLATTENED_PATTERN = Pattern.compile(

            "(-?\\d+) (-?\\d+) (-?\\d+) (-?\\d+)");

        static Matcher getMatcher(String str) {

            return FLATTENED_PATTERN.matcher(str);

        }

    }

    /**

     * Create a new empty Rect. All coordinates are initialized to 0.

     */

     * or null if the string is not of that form.

     */

    public static Rect unflattenFromString(String str) {

        Matcher matcher = FLATTENED_PATTERN.matcher(str);

        Matcher matcher = UnflattenHelper.getMatcher(str);

        if (!matcher.matches()) {

            return null;

        }