Make ExceptionState parameter of ContainerNode::querySelector() as an optional parameter

Make ExceptionState parameter of ContainerNode::querySelector() as an optional parameter

This patch makes |ExceptionState| parameter of |ContainerNode::querySelector()|
as an optional parameter to reduce source code size for improving code
readability and ease of writing tests, since there are lots of call of
|querySelector()| with |ASSERT_NO_EXCEPTION| in Blink unit tests.

BUG=n/a
TEST=n/a; no behavior changes

Committed: https://crrev.com/d7447926b684013f332153de1bd502dd2bcecb25
Cr-Commit-Position: refs/heads/master@{#407723}

[yosin_UTC9, 2016-07-26 01:59:01]

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

[commit-bot: I haz the power, 2016-07-26 01:59:21]

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

[yosin_UTC9, 2016-07-26 02:07:56]

Description was changed from

==========
2016-07-26T10:56:52

BUG=
==========

to

==========
Make ExceptionState parameter of ContainerNode::querySelector() as an optional
parameter

This patch makes |ExceptionState| parameter of |ContainerNode::querySelector()|
as an optional parameter to reduce source code size for improving code
readability and ease of writing tests, since there are lots of call of
|querySelector()| with |ASSERT_NO_EXCEPTION| in Blink unit tests.

BUG=n/a
TEST=n/a; no behavior changes
==========

[yosin_UTC9, 2016-07-26 02:08:27]

yosin@chromium.org changed reviewers:
+ tkent@chromium.org

[yosin_UTC9, 2016-07-26 02:08:28]

PTAL

[tkent, 2016-07-26 02:17:26]

lgtm

[yosin_UTC9, 2016-07-26 02:26:41]

The CQ bit was unchecked by yosin@chromium.org

[yosin_UTC9, 2016-07-26 02:26:43]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2016-07-26 02:27:00]

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, 2016-07-26 04:22:39]

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

[commit-bot: I haz the power, 2016-07-26 04:22:40]

Try jobs failed on following builders:
  linux_chromium_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[yosin_UTC9, 2016-07-26 05:20:17]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2016-07-26 05:20:34]

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, 2016-07-26 06:30:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-26 06:31:43]

Description was changed from

==========
Make ExceptionState parameter of ContainerNode::querySelector() as an optional
parameter

This patch makes |ExceptionState| parameter of |ContainerNode::querySelector()|
as an optional parameter to reduce source code size for improving code
readability and ease of writing tests, since there are lots of call of
|querySelector()| with |ASSERT_NO_EXCEPTION| in Blink unit tests.

BUG=n/a
TEST=n/a; no behavior changes
==========

to

==========
Make ExceptionState parameter of ContainerNode::querySelector() as an optional
parameter

This patch makes |ExceptionState| parameter of |ContainerNode::querySelector()|
as an optional parameter to reduce source code size for improving code
readability and ease of writing tests, since there are lots of call of
|querySelector()| with |ASSERT_NO_EXCEPTION| in Blink unit tests.

BUG=n/a
TEST=n/a; no behavior changes

Committed: https://crrev.com/d7447926b684013f332153de1bd502dd2bcecb25
Cr-Commit-Position: refs/heads/master@{#407723}
==========

[commit-bot: I haz the power, 2016-07-26 06:31:44]

Patchset 1 (id:??) landed as
https://crrev.com/d7447926b684013f332153de1bd502dd2bcecb25
Cr-Commit-Position: refs/heads/master@{#407723}