Add 10% CQ experiment for linux_chromium_chromeos_asan_rel_ng and mac_chromium_asan_rel_ng

Add 10% CQ experiment for linux_chromium_chromeos_asan_rel_ng and mac_chromium_asan_rel_ng

BUG=380709, 387743
R=akuegel@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/760e1100c86d5b147c4e82fa1d4886f48db401d7

[Paweł Hajdan Jr., 2015-10-14 11:06:11]

phajdan.jr@chromium.org changed reviewers:
+ akuegel@chromium.org

[Adrian Kuegel, 2015-10-14 11:21:16]

lgtm

[commit-bot: I haz the power, 2015-10-14 11:27:26]

Patchset 1 (id:??) landed as
https://crrev.com/760e1100c86d5b147c4e82fa1d4886f48db401d7
Cr-Commit-Position: refs/heads/master@{#353998}

[Paweł Hajdan Jr., 2015-10-14 11:27:53]

Committed patchset #1 (id:1) manually as
760e1100c86d5b147c4e82fa1d4886f48db401d7 (presubmit successful).

[jam, 2016-04-05 17:20:26]

mac_chromium_asan_rel_ng seems to have been removed. but
linux_chromium_chromeos_asan_rel_ng is still here.

https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium...
is failing most builds. What's the point of running it as an experiment for half
a year when no one is trying to make it always pass and promote it to CQ?