Adds functionality to update-w3c-test-expectations

Adds functionality to update-w3c-test-expectations

This cl adds functionality to the skip so that it skips adding
the failing test line if it already exists in TestExpectations.

BUG=625254
Committed: https://crrev.com/e2d465d888b64ea9053cd03ab2af8623dc05a4de
Cr-Commit-Position: refs/heads/master@{#407349}

[dcampb, 2016-07-23 00:01:14]

dcampb@google.com changed reviewers:
+ dpranke@chromium.org

[dcampb, 2016-07-23 00:01:14]

Please Note: I'm not sure if this is an issue or not, but this script will add
all of the try-bots failing results to test expectations. Shouldn't be a problem
though.

[Dirk Pranke, 2016-07-23 00:10:02]

lgtm

[dcampb, 2016-07-23 00:11:30]

The CQ bit was checked by dcampb@google.com

[commit-bot: I haz the power, 2016-07-23 00:11:57]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[dcampb, 2016-07-23 01:06:09]

The CQ bit was unchecked by dcampb@google.com

[dcampb, 2016-07-23 01:26:28]

minor change

[dcampb, 2016-07-23 01:26:49]

The CQ bit was checked by dcampb@google.com

[dcampb, 2016-07-23 01:26:50]

The patchset sent to the CQ was uploaded after l-g-t-m from dpranke@chromium.org
Link to the patchset: https://codereview.chromium.org/2174073002/#ps20001
(title: "minor change")

[commit-bot: I haz the power, 2016-07-23 01:27:05]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[dcampb, 2016-07-23 01:32:43]

The CQ bit was checked by dcampb@google.com

[commit-bot: I haz the power, 2016-07-23 01:33:05]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[dcampb, 2016-07-23 01:36:20]

The CQ bit was unchecked by dcampb@google.com

[dcampb, 2016-07-23 01:36:53]

The CQ bit was checked by dcampb@google.com

[commit-bot: I haz the power, 2016-07-23 01:37:19]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-23 04:02:27]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-23 04:04:24]

Description was changed from

==========
Adds functionality to update-w3c-test-expectations

This cl adds functionality to the skip so that it skips adding
the failing test line if it already exists in TestExpectations.


BUG=625254
==========

to

==========
Adds functionality to update-w3c-test-expectations

This cl adds functionality to the skip so that it skips adding
the failing test line if it already exists in TestExpectations.

BUG=625254

Committed: https://crrev.com/e2d465d888b64ea9053cd03ab2af8623dc05a4de
Cr-Commit-Position: refs/heads/master@{#407349}
==========

[commit-bot: I haz the power, 2016-07-23 04:04:25]

Patchset 2 (id:??) landed as
https://crrev.com/e2d465d888b64ea9053cd03ab2af8623dc05a4de
Cr-Commit-Position: refs/heads/master@{#407349}