Ensure that the browser’s copy of page id is in sync with the renderer’s.

Ensure that the browser’s copy of page id is in sync with the renderer’s.

This has debugging statements in case it turns out not to be. Fingers crossed, though.

BUG=407376
TEST=no crashing, we hope

Committed: https://crrev.com/86823cbf672c0840146a93dc1d2217f01a9d6909
Cr-Commit-Position: refs/heads/master@{#294008}

[Avi (use Gerrit), 2014-09-08 19:02:52]

avi@chromium.org changed reviewers:
+ creis@chromium.org, rsesek@chromium.org

[Avi (use Gerrit), 2014-09-08 19:02:52]

Robert, you know the drill. We get to see if the changes I made since last time
made the crashes go away. If they didn't then I need some debugging info.
Charlie. Again, yes?

[Robert Sesek, 2014-09-08 19:05:20]

LGTM

[Charlie Reis, 2014-09-08 19:08:17]

Let's give it another try.  LGTM.

[Avi (use Gerrit), 2014-09-08 20:34:24]

The CQ bit was checked by avi@chromium.org

[commit-bot: I haz the power, 2014-09-08 20:36:52]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/avi@chromium.org/549243002/1

[Avi (use Gerrit), 2014-09-09 03:16:38]

The CQ bit was unchecked by avi@chromium.org

[Paweł Hajdan Jr., 2014-09-09 12:33:51]

The CQ bit was checked by phajdan.jr@chromium.org

[commit-bot: I haz the power, 2014-09-09 12:34:29]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/avi@chromium.org/549243002/1

[commit-bot: I haz the power, 2014-09-09 13:14:39]

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

[commit-bot: I haz the power, 2014-09-09 13:14:40]

Try jobs failed on following builders:
  mac_chromium_rel_swarming on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Avi (use Gerrit), 2014-09-09 19:06:54]

The CQ bit was checked by avi@chromium.org

[commit-bot: I haz the power, 2014-09-09 19:09:13]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/avi@chromium.org/549243002/1

[commit-bot: I haz the power, 2014-09-09 21:11:06]

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

[commit-bot: I haz the power, 2014-09-09 21:11:07]

Failed to commit the patch.

[commit-bot: I haz the power, 2014-09-10 03:55:36]

Patchset 1 (id:??) landed as
https://crrev.com/86823cbf672c0840146a93dc1d2217f01a9d6909
Cr-Commit-Position: refs/heads/master@{#294008}