Add --help and --verbose options to update-w3c-test-expectations.

Add --help and --verbose options to update-w3c-test-expectations.

This CL also adds more logging in update_w3c_test_expectations.py, and changes deps_updater.py to run this script with the --verbose flag.

Purpose of this CL:
 1. Make it easier to diagnose issues with w3c-test-autoroller in the future.
 2. Start to make update-w3c-test-expectations better to use directly.

BUG=643761
Committed: https://crrev.com/194e7e00f26329a3f0170e831c9c07b61ef20aeb
Cr-Commit-Position: refs/heads/master@{#418718}

[qyearsley, 2016-09-13 16:54:26]

Description was changed from

==========
Add arg parsing to update-w3c-test-expectations.


Start
==========

to

==========
Add --help and --verbose options to update-w3c-test-expectations.
==========

[qyearsley, 2016-09-13 16:54:27]

qyearsley@chromium.org changed reviewers:
+ kojii@chromium.org

[qyearsley, 2016-09-14 18:18:28]

Description was changed from

==========
Add --help and --verbose options to update-w3c-test-expectations.
==========

to

==========
Add --help and --verbose options to update-w3c-test-expectations.

This CL also adds more logging in update_w3c_test_expectations.py, and changes
deps_updater.py to run this script with the --verbose flag.

Purpose of this CL:
 1. Make it easier to diagnose issues with w3c-test-autoroller in the future.
 2. Start to make update-w3c-test-expectations better to use directly.

BUG=643761
==========

[qyearsley, 2016-09-14 18:18:28]

qyearsley@chromium.org changed reviewers:
+ dpranke@chromium.org

[qyearsley, 2016-09-14 18:18:35]

The CQ bit was checked by qyearsley@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-09-14 18:19:25]

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

[Dirk Pranke, 2016-09-14 18:47:24]

lgtm

[commit-bot: I haz the power, 2016-09-14 19:43:10]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-09-14 19:43:14]

Dry run: This issue passed the CQ dry run.

[qyearsley, 2016-09-15 00:03:35]

The CQ bit was checked by qyearsley@chromium.org

[commit-bot: I haz the power, 2016-09-15 00:04:03]

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, 2016-09-15 00:11:39]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-09-15 00:14:38]

Description was changed from

==========
Add --help and --verbose options to update-w3c-test-expectations.

This CL also adds more logging in update_w3c_test_expectations.py, and changes
deps_updater.py to run this script with the --verbose flag.

Purpose of this CL:
 1. Make it easier to diagnose issues with w3c-test-autoroller in the future.
 2. Start to make update-w3c-test-expectations better to use directly.

BUG=643761
==========

to

==========
Add --help and --verbose options to update-w3c-test-expectations.

This CL also adds more logging in update_w3c_test_expectations.py, and changes
deps_updater.py to run this script with the --verbose flag.

Purpose of this CL:
 1. Make it easier to diagnose issues with w3c-test-autoroller in the future.
 2. Start to make update-w3c-test-expectations better to use directly.

BUG=643761

Committed: https://crrev.com/194e7e00f26329a3f0170e831c9c07b61ef20aeb
Cr-Commit-Position: refs/heads/master@{#418718}
==========

[commit-bot: I haz the power, 2016-09-15 00:14:40]

Patchset 3 (id:??) landed as
https://crrev.com/194e7e00f26329a3f0170e831c9c07b61ef20aeb
Cr-Commit-Position: refs/heads/master@{#418718}