Use FileDescriptorWatcher in ClipboardX11.

Use FileDescriptorWatcher in ClipboardX11.

This allows ClipboardX11 to be used from any thread that
instantiates a FileDescriptorWatcher (not just threads that run
a MessageLoopForIO). This will facilitate the migration of
BrowserThreads to base/task_scheduler.

BUG=645114
Committed: https://crrev.com/cd80c412bd3fce4aca1f9ea6a30030bc1b4a862e
Cr-Commit-Position: refs/heads/master@{#422448}

[fdoray, 2016-09-30 21:59:49]

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

[commit-bot: I haz the power, 2016-09-30 22:00:23]

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, 2016-09-30 22:09:39]

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

[commit-bot: I haz the power, 2016-09-30 22:09:40]

Dry run: This issue passed the CQ dry run.

[fdoray, 2016-10-03 15:02:20]

fdoray@chromium.org changed reviewers:
+ jamiewalch@chromium.org

[fdoray, 2016-10-03 15:02:21]

PTAL

[Jamie, 2016-10-03 17:08:15]

lgtm

[fdoray, 2016-10-03 17:09:40]

The CQ bit was checked by fdoray@chromium.org

[commit-bot: I haz the power, 2016-10-03 17:09:57]

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, 2016-10-03 17:23:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-03 17:24:24]

Description was changed from

==========
Use FileDescriptorWatcher in ClipboardX11.

This allows ClipboardX11 to be used from any thread that
instantiates a FileDescriptorWatcher (not just threads that run
a MessageLoopForIO). This will facilitate the migration of
BrowserThreads to base/task_scheduler.

BUG=645114
==========

to

==========
Use FileDescriptorWatcher in ClipboardX11.

This allows ClipboardX11 to be used from any thread that
instantiates a FileDescriptorWatcher (not just threads that run
a MessageLoopForIO). This will facilitate the migration of
BrowserThreads to base/task_scheduler.

BUG=645114

Committed: https://crrev.com/cd80c412bd3fce4aca1f9ea6a30030bc1b4a862e
Cr-Commit-Position: refs/heads/master@{#422448}
==========

[commit-bot: I haz the power, 2016-10-03 17:24:25]

Patchset 1 (id:??) landed as
https://crrev.com/cd80c412bd3fce4aca1f9ea6a30030bc1b4a862e
Cr-Commit-Position: refs/heads/master@{#422448}