Fix issues with sending tts queue lots of utterances

Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is a focusable div that wraps almost the entire contents of the page. We end up generating Output for everything under the div and lag significantly when focus lands here.
Fix this by only taking the text content of divs as one large string.  $descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG=672955
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Committed: https://crrev.com/a740f7ec72a6bf88e269f52c5561dd57ffde1589
Cr-Commit-Position: refs/heads/master@{#437925}

[David Tseng, 2016-12-09 23:10:23]

Description was changed from

==========
Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is
a focusable div that wraps almost the entire contents of the page. We end up
generating Output for everything under the div and lag significantly when focus
lands here.
Fix this by only taking the text content of divs as one large string. 
$descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For
example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG=
==========

to

==========
Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is
a focusable div that wraps almost the entire contents of the page. We end up
generating Output for everything under the div and lag significantly when focus
lands here.
Fix this by only taking the text content of divs as one large string. 
$descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For
example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG=
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
==========

[David Tseng, 2016-12-09 23:10:48]

dtseng@chromium.org changed reviewers:
+ dmazzoni@chromium.org

[David Tseng, 2016-12-09 23:48:56]

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

[commit-bot: I haz the power, 2016-12-09 23:49:35]

Dry run: 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, 2016-12-10 01:51:26]

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

[commit-bot: I haz the power, 2016-12-10 01:51:27]

Dry run: Try jobs failed on following builders:
  chromeos_amd64-generic_chromium_compile_only_ng on
master.tryserver.chromium.linux (JOB_TIMED_OUT, no build URL)
  closure_compilation on master.tryserver.chromium.linux (JOB_TIMED_OUT, no
build URL)
  linux_chromium_chromeos_rel_ng on master.tryserver.chromium.linux
(JOB_TIMED_OUT, no build URL)
  linux_chromium_compile_dbg_ng on master.tryserver.chromium.linux
(JOB_TIMED_OUT, no build URL)
  linux_chromium_rel_ng on master.tryserver.chromium.linux (JOB_TIMED_OUT, no
build URL)

[dmazzoni, 2016-12-12 18:34:22]

lgtm

[David Tseng, 2016-12-12 18:42:39]

Description was changed from

==========
Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is
a focusable div that wraps almost the entire contents of the page. We end up
generating Output for everything under the div and lag significantly when focus
lands here.
Fix this by only taking the text content of divs as one large string. 
$descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For
example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG=
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
==========

to

==========
Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is
a focusable div that wraps almost the entire contents of the page. We end up
generating Output for everything under the div and lag significantly when focus
lands here.
Fix this by only taking the text content of divs as one large string. 
$descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For
example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG=672955
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
==========

[David Tseng, 2016-12-12 19:12:23]

The CQ bit was checked by dtseng@chromium.org

[David Tseng, 2016-12-12 19:12:24]

The patchset sent to the CQ was uploaded after l-g-t-m from
dmazzoni@chromium.org
Link to the patchset: https://codereview.chromium.org/2563173002/#ps40001
(title: "Fix issues with sending tts queue lots of utterances")

[commit-bot: I haz the power, 2016-12-12 19:13:07]

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, 2016-12-12 22:08:14]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1481569943863200,
"parent_rev": "c80ee3f777a777a422379ad20f95929866a89b9e", "commit_rev":
"5c634996fe9015240ce3f66bb184e5ab4ec4816e"}

[commit-bot: I haz the power, 2016-12-12 22:08:42]

Description was changed from

==========
Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is
a focusable div that wraps almost the entire contents of the page. We end up
generating Output for everything under the div and lag significantly when focus
lands here.
Fix this by only taking the text content of divs as one large string. 
$descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For
example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG=672955
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
==========

to

==========
Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is
a focusable div that wraps almost the entire contents of the page. We end up
generating Output for everything under the div and lag significantly when focus
lands here.
Fix this by only taking the text content of divs as one large string. 
$descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For
example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG=672955
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2563173002
==========

[commit-bot: I haz the power, 2016-12-12 22:08:43]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-12-12 22:10:35]

Description was changed from

==========
Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is
a focusable div that wraps almost the entire contents of the page. We end up
generating Output for everything under the div and lag significantly when focus
lands here.
Fix this by only taking the text content of divs as one large string. 
$descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For
example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG=672955
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2563173002
==========

to

==========
Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is
a focusable div that wraps almost the entire contents of the page. We end up
generating Output for everything under the div and lag significantly when focus
lands here.
Fix this by only taking the text content of divs as one large string. 
$descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For
example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG=672955
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Committed: https://crrev.com/a740f7ec72a6bf88e269f52c5561dd57ffde1589
Cr-Commit-Position: refs/heads/master@{#437925}
==========

[commit-bot: I haz the power, 2016-12-12 22:10:36]

Patchset 3 (id:??) landed as
https://crrev.com/a740f7ec72a6bf88e269f52c5561dd57ffde1589
Cr-Commit-Position: refs/heads/master@{#437925}