--webkit-visual-word crashes (VisiblePosition.getInlineBoxAndOffset could return null box)

[Xiaomei Ji]

Test case:

<script src="resources/move-by-word-visually.js"></script>
<script>

onload = function() {
    try {
        runTest();
    } finally {
    }
};

</script>
<output><div class="test_move_by_word">


In Chromium bug: http://code.google.com/p/chromium/issues/detail?id=86332

[Xiaomei Ji]

Committed r91077: <http://trac.webkit.org/changeset/91077>