Fix and enable media/track/opera/track/webvtt/parsing-cue-data/* tests

Fix and enable media/track/opera/track/webvtt/parsing-cue-data/* tests

Fix up the tests in above directory - mainly by disabling the
"pretty-printed" diff (which makes for very verbose *-expected files
anyway - and can be enabled reasonably easy during debugging if needed.)

The 'entities' test is not enabled at this time because it (at least one
of the subtests) trigger an assert.

BUG=305317, 319391
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=162308

[jochen (gone - plz use gerrit), 2013-11-19 16:06:45]

lgtm

https://codereview.chromium.org/61213005/diff/1/LayoutTests/media/track/opera...
File LayoutTests/media/track/opera/track/webvtt/parsing-cue-data/common.js
(right):

https://codereview.chromium.org/61213005/diff/1/LayoutTests/media/track/opera...
LayoutTests/media/track/opera/track/webvtt/parsing-cue-data/common.js:201: // if
(got !== this.expected) {
what about making this configurable by defining a variable on window, something
like window.prettyPrintDiffs = true

[fs, 2013-11-19 17:07:24]

Added checking for window.prettyPrintDiffs.

[jochen (gone - plz use gerrit), 2013-11-19 17:09:13]

lgtm

[commit-bot: I haz the power, 2013-11-19 17:10:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/fs@opera.com/61213005/60001

[commit-bot: I haz the power, 2013-11-19 18:50:40]

Change committed as 162308