Cleanup temporary incognito mode files after last tab closes.

        }

    }

    /**

     * Deletes any files that were created as a part of the last private

     * browsing session and clears any internal state associated with that

     * session. The consequences of calling this method while a private

     * browsing session is active are unspecified.

     * @param context The same context which was used to create the private

     *                browsing WebView.

     * @return True if the private browsing files were successfully deleted,

     *         false otherwise.

     * @hide pending API council approval.

     */

    public static boolean cleanupPrivateBrowsingFiles(Context context) {

        return nativeCleanupPrivateBrowsingFiles(context.getFilesDir().getParent());

    }

    private static native boolean nativeCleanupPrivateBrowsingFiles(String dataDirectory);

    private boolean extendScroll(int y) {

        int finalY = mScroller.getFinalY();

        int newY = pinLocY(finalY + y);