Verify that the RPH is still alive when handling incoming Notification IPCs.

Verify that the RPH is still alive when handling incoming Notification IPCs.

The NotificationMessageFilter still receives a number of IPC messages on
the UI thread. It is possible that the IPC message gets handled after
the profile has been shut down, so make sure that this isn't the case
by verifying that the RenderProcessHost still exists.

BUG=457590
Committed: https://crrev.com/d32d9a39c937b4be585af39589d05e903e703c96
Cr-Commit-Position: refs/heads/master@{#321421}

[Peter Beverloo, 2015-03-19 16:01:49]

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

[Peter Beverloo, 2015-03-19 16:01:50]

+tsepez

This sounds like a patch up your alley :-). Mind taking a look?

[Tom Sepez, 2015-03-19 17:59:08]

lgtm

[Peter Beverloo, 2015-03-19 18:05:43]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2015-03-19 18:06:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1023633003/1

[commit-bot: I haz the power, 2015-03-19 20:26:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-19 20:28:30]

Patchset 1 (id:??) landed as
https://crrev.com/d32d9a39c937b4be585af39589d05e903e703c96
Cr-Commit-Position: refs/heads/master@{#321421}