Update notification text colors to match spec.

Update notification text colors to match spec.

Header: (80%) #333
Message: (80%) #333
Context Message: (50%) #7f7f7f

BUG=276004
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=221441

[dewittj, 2013-09-04 20:51:04]

ping

[jianli, 2013-09-04 20:51:43]

lgtm

[commit-bot: I haz the power, 2013-09-04 23:25:02]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dewittj@chromium.org/23530018/1

[commit-bot: I haz the power, 2013-09-05 00:31:16]

Retried try job too often on ios_dbg_simulator for step(s) ui_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=ios_dbg_si...

[commit-bot: I haz the power, 2013-09-05 00:36:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dewittj@chromium.org/23530018/1

[commit-bot: I haz the power, 2013-09-05 01:09:02]

Retried try job too often on ios_dbg_simulator for step(s) ui_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=ios_dbg_si...

[commit-bot: I haz the power, 2013-09-05 15:33:00]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dewittj@chromium.org/23530018/1

[commit-bot: I haz the power, 2013-09-05 15:50:49]

Change committed as 221441