Revert "Remove notifications from PrintPreviewDialogController."

Revert "Remove notifications from PrintPreviewDialogController."

This essentially reverts r243252.

BUG=170921, 359627
TEST=as in bug

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=264917

[Avi (use Gerrit), 2014-04-18 22:23:59]

I would like to not do this, but I'm stumped and we need to get this working
again ... :(

This is pretty much a revert, mod the new function added that I rewrote the old
way. I confirmed that this fixes the problem on my local build.

[Lei Zhang, 2014-04-18 22:28:03]

lgtm, and sad trombone.

[Avi (use Gerrit), 2014-04-18 22:30:13]

The CQ bit was checked by avi@chromium.org

[commit-bot: I haz the power, 2014-04-18 22:30:23]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/avi@chromium.org/243703004/1

[commit-bot: I haz the power, 2014-04-18 23:04:50]

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

[commit-bot: I haz the power, 2014-04-18 23:04:50]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_chromeos_clang_dbg

[Lei Zhang, 2014-04-18 23:15:31]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2014-04-18 23:15:48]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/avi@chromium.org/243703004/1

[commit-bot: I haz the power, 2014-04-19 01:10:13]

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

[commit-bot: I haz the power, 2014-04-19 01:10:14]

Try jobs failed on following builders:
  tryserver.chromium on win_chromium_rel

[Lei Zhang, 2014-04-19 01:11:49]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2014-04-19 01:12:14]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/avi@chromium.org/243703004/1

[commit-bot: I haz the power, 2014-04-19 03:27:32]

Change committed as 264917