Don't use base::MessageLoop::{Quit,QuitClosure} in mojo/

Don't use base::MessageLoop::{Quit,QuitClosure} in mojo/

This patch renames base::MessageLoop::{Quit,QuitClosure} to
base::MessageLoop::{QuitWhenIdle,QuitWhenIdleClosure}.

BUG=131220
TEST=
R=sky@chromium.org

Committed: https://crrev.com/f8812d5afcc531663f1ad4ddfcaefd49f54aeac0
Cr-Commit-Position: refs/heads/master@{#353587}

[ki.stfu, 2015-10-12 13:42:19]

ping

[sky, 2015-10-12 19:09:34]

LGTM

[ki.stfu, 2015-10-12 19:20:06]

The CQ bit was checked by ki.stfu@gmail.com

[commit-bot: I haz the power, 2015-10-12 19:20:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1402533003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1402533003/1

[commit-bot: I haz the power, 2015-10-12 20:29:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-12 20:30:33]

Patchset 1 (id:??) landed as
https://crrev.com/f8812d5afcc531663f1ad4ddfcaefd49f54aeac0
Cr-Commit-Position: refs/heads/master@{#353587}