Reviewed by Jeremy Orlow.

        Geolocation LayoutTests should make more careful use of LayoutTestController
        https://bugs.webkit.org/show_bug.cgi?id=39994

        Guards calls to LayoutTestController methods with 'if (window.layoutTestController)'
        and adds test output to make it clear if the test can not pass without LayoutTestController.
        Also removes superfluous calls to LayoutTestController.waitUntilDone(), which are now made
        by js-test-post.js.

        * fast/dom/Geolocation/callback-exception-expected.txt:
        * fast/dom/Geolocation/script-tests/callback-exception.js:
        * fast/dom/Geolocation/script-tests/error.js:
        * fast/dom/Geolocation/script-tests/maximum-age.js:
        * fast/dom/Geolocation/script-tests/notimer-after-unload.js:
        * fast/dom/Geolocation/script-tests/permission-denied-already-clear-watch.js:
        * fast/dom/Geolocation/script-tests/permission-denied-already-error.js:
        * fast/dom/Geolocation/script-tests/permission-denied-already-success.js:
        * fast/dom/Geolocation/script-tests/permission-denied-stops-watches.js:
        * fast/dom/Geolocation/script-tests/permission-denied.js:
        * fast/dom/Geolocation/script-tests/position-string.js:
        * fast/dom/Geolocation/script-tests/reentrant-error.js:
        * fast/dom/Geolocation/script-tests/reentrant-success.js:
        * fast/dom/Geolocation/script-tests/success.js:
        * fast/dom/Geolocation/script-tests/timeout-clear-watch.js:
        * fast/dom/Geolocation/script-tests/timeout-zero.js:
        * fast/dom/Geolocation/script-tests/timeout.js:
        * fast/dom/Geolocation/script-tests/watch.js:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@60667 268f45cc-cd09-0410-ab3c-d52691b4dbfc