[test] Refactoring - Let runner handle test IDs.

[test] Refactoring - Let runner handle test IDs.

This prepares for properly rerunning tests. Currently when
tests are rerun, the same test object is reused. This
will be changed in a follow up.

Committed: https://crrev.com/f41a81b8a513fc360c500c066b74f223bc9c0223
Cr-Commit-Position: refs/heads/master@{#28864}

[Michael Achenbach, 2015-06-09 13:43:44]

machenbach@chromium.org changed reviewers:
+ jkummerow@chromium.org, tandrii@chromium.org

[Michael Achenbach, 2015-06-09 13:45:15]

PTAL

[Michael Achenbach, 2015-06-09 13:45:20]

The CQ bit was checked by machenbach@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-06-09 13:45:27]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1168303007/1

[Jakob Kummerow, 2015-06-09 13:48:57]

lgtm

[Michael Achenbach, 2015-06-09 14:10:37]

The CQ bit was unchecked by machenbach@chromium.org

[Michael Achenbach, 2015-06-09 14:10:46]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-06-09 14:11:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1168303007/1

[commit-bot: I haz the power, 2015-06-09 14:17:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-09 14:17:16]

Patchset 1 (id:??) landed as
https://crrev.com/f41a81b8a513fc360c500c066b74f223bc9c0223
Cr-Commit-Position: refs/heads/master@{#28864}

[Michael Achenbach, 2015-06-10 06:46:20]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1167343003/ by machenbach@chromium.org.

The reason for reverting is: [Sheriff] Revert until the tree is in a better
state..