Mojo: Add mojo_shell_tests to the Linux bots.

(It seems to be passing on the, uh, Linux Trusty FYI bots, which should
be close enough.)

R=sky@chromium.org

Review URL: https://codereview.chromium.org/331993008

git-svn-id: http://src.chromium.org/chrome/trunk/src/testing@279472 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
Add extensions_unittests targets to run on major platform try bots.

This target has been running on Chromium.FYI for quite some time now, so
it should be good to put them on try bots as well.

BUG=348066
TEST=green trybots
R=sky@chromium.org

Review URL: https://codereview.chromium.org/355513003

git-svn-id: http://src.chromium.org/chrome/trunk/src/testing@279490 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
Revert 279472 "Mojo: Add mojo_shell_tests to the Linux bots."

This is causing test failure:
http://build.chromium.org/p/chromium.linux/builders/Linux%20Tests/builds/11834/steps/mojo_shell_tests/logs/LaunchServiceInProcess

> Mojo: Add mojo_shell_tests to the Linux bots.
> 
> (It seems to be passing on the, uh, Linux Trusty FYI bots, which should
> be close enough.)
> 
> R=sky@chromium.org
> 
> Review URL: https://codereview.chromium.org/331993008

TBR=viettrungluu@chromium.org

Review URL: https://codereview.chromium.org/353753003

git-svn-id: http://src.chromium.org/chrome/trunk/src/testing@279501 4ff67af0-8c30-449e-8e8b-ad334ec8d88c