Remove a renderer -> browser roundtrip for resolving the showNotification promise.

Remove a renderer -> browser roundtrip for resolving the showNotification promise.

We always confirm, so we may as well remove the roundtrip together.

BUG=432527
Committed: https://crrev.com/5eea7412cff596debc210f374211e5c73ba4fdaf
Cr-Commit-Position: refs/heads/master@{#308111}

[Michael van Ouwerkerk, 2014-12-12 14:38:24]

mvanouwerkerk@chromium.org changed reviewers:
+ mvanouwerkerk@chromium.org

[Michael van Ouwerkerk, 2014-12-12 14:38:24]

lgtm

[Peter Beverloo, 2014-12-12 14:39:27]

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

[Peter Beverloo, 2014-12-12 14:39:27]

+mkwst -- feeling good enough for some very simple IPC message redness?

[Mike West, 2014-12-12 15:28:31]

LGTM.

[Peter Beverloo, 2014-12-12 16:27:32]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2014-12-12 16:28:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/803523002/20001

[commit-bot: I haz the power, 2014-12-12 17:36:01]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-12-12 17:36:56]

Patchset 2 (id:??) landed as
https://crrev.com/5eea7412cff596debc210f374211e5c73ba4fdaf
Cr-Commit-Position: refs/heads/master@{#308111}