Remove limitation that renderer can't send sync IPCs to the UI thread in the browser.

Remove limitation that renderer can't send sync IPCs to the UI thread in the browser.

Now that we don't have windowed NPAPI plugins, this deadlock doesn't exist anymore.

BUG=493212
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Committed: https://crrev.com/17acb78d1b36d7ff5ba7dcc4f04c853241f54aa3
Cr-Commit-Position: refs/heads/master@{#377166}

[jam, 2016-02-22 22:45:47]

Description was changed from

==========
Remove limitation that renderer can't send sync IPCs to the UI thread in the
browser.

Now that we don't have windowed NPAPI plugins, this deadlock doesn't exist
anymore.

BUG=493212
==========

to

==========
Remove limitation that renderer can't send sync IPCs to the UI thread in the
browser.

Now that we don't have windowed NPAPI plugins, this deadlock doesn't exist
anymore.

BUG=493212
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation
==========

[jam, 2016-02-23 22:24:01]

jam@chromium.org changed reviewers:
+ tsepez@chromium.org

[jam, 2016-02-23 22:35:31]

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

[commit-bot: I haz the power, 2016-02-23 22:42:36]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1723473003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1723473003/1

[Tom Sepez, 2016-02-23 22:51:47]

LGTM on the mechanics of deleting code; I didn't confirm whether the premise was
correct.

[jam, 2016-02-23 23:19:58]

The CQ bit was unchecked by jam@chromium.org

[jam, 2016-02-23 23:19:58]

The CQ bit was checked by jam@chromium.org

[commit-bot: I haz the power, 2016-02-23 23:24:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1723473003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1723473003/1

[commit-bot: I haz the power, 2016-02-24 01:15:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-24 01:16:36]

Description was changed from

==========
Remove limitation that renderer can't send sync IPCs to the UI thread in the
browser.

Now that we don't have windowed NPAPI plugins, this deadlock doesn't exist
anymore.

BUG=493212
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation
==========

to

==========
Remove limitation that renderer can't send sync IPCs to the UI thread in the
browser.

Now that we don't have windowed NPAPI plugins, this deadlock doesn't exist
anymore.

BUG=493212
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Committed: https://crrev.com/17acb78d1b36d7ff5ba7dcc4f04c853241f54aa3
Cr-Commit-Position: refs/heads/master@{#377166}
==========

[commit-bot: I haz the power, 2016-02-24 01:16:37]

Patchset 1 (id:??) landed as
https://crrev.com/17acb78d1b36d7ff5ba7dcc4f04c853241f54aa3
Cr-Commit-Position: refs/heads/master@{#377166}