Added null safety to CSSParserContext args in CSSPropertyOffsetPathUtils

Added null safety to CSSParserContext args in CSSPropertyOffsetPathUtils

Changed CSSParserContext argument from * to & for null safety and
readability.

BUG=668012
Review-Url: https://codereview.chromium.org/2918283002
Cr-Commit-Position: refs/heads/master@{#477597}
Committed: https://chromium.googlesource.com/chromium/src/+/1f3b0bc4573600a0a9622146949f0e4b0c2209f0

[Bugs Nash, 2017-06-05 03:17:10]

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

[commit-bot: I haz the power, 2017-06-05 03:17:23]

Dry run: CQ is trying da patch.

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

[Bugs Nash, 2017-06-05 03:18:15]

bugsnash@chromium.org changed reviewers:
+ shend@chromium.org

[shend, 2017-06-05 04:17:53]

lgtm

[Bugs Nash, 2017-06-05 04:20:48]

bugsnash@chromium.org changed reviewers:
+ alancutter@chromium.org

[Bugs Nash, 2017-06-05 04:20:48]

+alancutter for owners

[commit-bot: I haz the power, 2017-06-05 05:31:26]

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

[commit-bot: I haz the power, 2017-06-05 05:31:26]

Dry run: This issue passed the CQ dry run.

[alancutter (OOO until 2018), 2017-06-07 05:07:44]

lgtm

[Bugs Nash, 2017-06-07 07:35:21]

The CQ bit was checked by bugsnash@chromium.org

[commit-bot: I haz the power, 2017-06-07 07:35:37]

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, 2017-06-07 09:34:22]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1496820921783080, "parent_rev":
"596241679d74362580facc364ce3c5d658a2a7cc", "commit_rev":
"1f3b0bc4573600a0a9622146949f0e4b0c2209f0"}

[commit-bot: I haz the power, 2017-06-07 09:34:36]

Description was changed from

==========
Added null safety to CSSParserContext args in CSSPropertyOffsetPathUtils

Changed CSSParserContext argument from * to & for null safety and
readability.

BUG=668012
==========

to

==========
Added null safety to CSSParserContext args in CSSPropertyOffsetPathUtils

Changed CSSParserContext argument from * to & for null safety and
readability.

BUG=668012

Review-Url: https://codereview.chromium.org/2918283002
Cr-Commit-Position: refs/heads/master@{#477597}
Committed:
https://chromium.googlesource.com/chromium/src/+/1f3b0bc4573600a0a9622146949f...
==========

[commit-bot: I haz the power, 2017-06-07 09:34:37]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/1f3b0bc4573600a0a9622146949f...