Add undocumented AppLaunchBucket enum values to histograms.xml.

Add undocumented AppLaunchBucket enum values to histograms.xml.

This enum is defined in chrome/common/extensions/extension_constants.h

R=jar@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=226388

[jar (doing other things), 2013-10-01 22:00:03]

lgtm

[commit-bot: I haz the power, 2013-10-01 22:02:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/koz@chromium.org/25457002/1

[commit-bot: I haz the power, 2013-10-01 23:28:38]

Sorry for I got bad news for ya.
Compile failed with a clobber build on win_x64_rel.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_x64_re...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-10-01 23:43:58]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/koz@chromium.org/25457002/1

[commit-bot: I haz the power, 2013-10-02 00:13:08]

Sorry for I got bad news for ya.
Compile failed with a clobber build on win_x64_rel.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_x64_re...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[koz (OOO until 15th September), 2013-10-02 03:24:21]

Committed patchset #1 manually as r226388 (presubmit successful).