Use ui::AX_EVENT_SELECTION to read aloud omnibox suggestion answers.

Use ui::AX_EVENT_SELECTION to read aloud omnibox suggestion answers.

The previous approach (ui::AX_EVENT_ALERT) allowed the speaking to be
interrupted by other events.

BUG=714148
Review-Url: https://codereview.chromium.org/2871973002
Cr-Commit-Position: refs/heads/master@{#470404}
Committed: https://chromium.googlesource.com/chromium/src/+/97e8179a439eb85276dd8fefa806133b1c965eca

[Justin Donnelly, 2017-05-09 15:30:18]

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

[commit-bot: I haz the power, 2017-05-09 15:30:56]

Dry run: CQ is trying da patch.

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

[Justin Donnelly, 2017-05-09 15:32:38]

jdonnelly@chromium.org changed reviewers:
+ pkasting@chromium.org

[Peter Kasting, 2017-05-09 17:46:41]

RS LGTM

[commit-bot: I haz the power, 2017-05-09 18:11:33]

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

[commit-bot: I haz the power, 2017-05-09 18:11:34]

Dry run: This issue passed the CQ dry run.

[Justin Donnelly, 2017-05-09 18:35:31]

The CQ bit was checked by jdonnelly@chromium.org

[commit-bot: I haz the power, 2017-05-09 18:36:49]

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, 2017-05-09 19:18:35]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1494354931739600, "parent_rev":
"3cf9dc16046236cc9772df62de7272a3412ded0a", "commit_rev":
"97e8179a439eb85276dd8fefa806133b1c965eca"}

[commit-bot: I haz the power, 2017-05-09 19:18:46]

Description was changed from

==========
Use ui::AX_EVENT_SELECTION to read aloud omnibox suggestion answers.

The previous approach (ui::AX_EVENT_ALERT) allowed the speaking to be
interrupted by other events.

BUG=714148
==========

to

==========
Use ui::AX_EVENT_SELECTION to read aloud omnibox suggestion answers.

The previous approach (ui::AX_EVENT_ALERT) allowed the speaking to be
interrupted by other events.

BUG=714148

Review-Url: https://codereview.chromium.org/2871973002
Cr-Commit-Position: refs/heads/master@{#470404}
Committed:
https://chromium.googlesource.com/chromium/src/+/97e8179a439eb85276dd8fefa806...
==========

[commit-bot: I haz the power, 2017-05-09 19:18:47]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/97e8179a439eb85276dd8fefa806...