Reland [test] Refactoring - Let runner handle test IDs.

Reland [test] Refactoring - Let runner handle test IDs.

Reason for revert:
All build problems had other reasons.

Original issue's description:
> Revert of [test] Refactoring - Let runner handle test IDs. (patchset #1 id:1 of https://codereview.chromium.org/1168303007/)
>
> Reason for revert:
> [Sheriff] Revert until the tree is in a better state.
>
> Original issue's description:
> > [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}
>
> TBR=jkummerow@chromium.org,tandrii@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
>
> Committed: https://crrev.com/f83444a5f24381ec9ccc28b1e18e1e9370415bb2
> Cr-Commit-Position: refs/heads/master@{#28891}

TBR=jkummerow@chromium.org,tandrii@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/f8fe5c6bcf586764b10e694316eca7c0f7c79209
Cr-Commit-Position: refs/heads/master@{#28903}

[Michael Achenbach, 2015-06-10 10:14:32]

Created Revert of Revert of [test] Refactoring - Let runner handle test IDs.

[Michael Achenbach, 2015-06-10 10:15:04]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-06-10 10:15:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1179483002/1

[commit-bot: I haz the power, 2015-06-10 10:15:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-10 10:15:38]

Patchset 1 (id:??) landed as
https://crrev.com/f8fe5c6bcf586764b10e694316eca7c0f7c79209
Cr-Commit-Position: refs/heads/master@{#28903}