Do not trigger action mode actions after being destroyed.

Do not trigger action mode actions after being destroyed.

After calling destroy on the action mode, you can still click on the
view as it is being torn down.  This can cause you to call methods
on a defunct CVC in certain cases causing a crash.

To work around this, track if destroy has been called and stop calling
our handler in that case.

BUG=525365
Committed: https://crrev.com/9d19f85316095d9fac5ecf0a507b2270f1d04e90
Cr-Commit-Position: refs/heads/master@{#347298}

[Ted C, 2015-09-03 22:48:41]

tedchoc@chromium.org changed reviewers:
+ jdduke@chromium.org

[Ted C, 2015-09-03 22:48:41]

PTAL

[jdduke (slow), 2015-09-03 22:52:56]

On 2015/09/03 22:48:41, Ted C wrote:
> PTAL

Scary, lgtm.

[Ted C, 2015-09-04 00:01:06]

The CQ bit was checked by tedchoc@chromium.org

[commit-bot: I haz the power, 2015-09-04 00:01:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1323263004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1323263004/1

[commit-bot: I haz the power, 2015-09-04 01:03:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-04 01:04:43]

Patchset 1 (id:??) landed as
https://crrev.com/9d19f85316095d9fac5ecf0a507b2270f1d04e90
Cr-Commit-Position: refs/heads/master@{#347298}