Bug 1079692 --  [Flame][Woodduck][Free Test][Video] Make video title tru...

...ncation process more efficient
In my opinion, it's hard to read the diff of the getTruncated unit tests tests (in video_utils_test.js). It's probably easier to apply the patch and review all the getTruncated tests. At a high level, I removed the tests that used the ellipsisIndex option and I added tests that don't specify the maxLine option and I added tests that include padding on the title node.