Revert of Revert of Revert of Isolate courgette_unittests (patchset #1 id:1 of https://codereview.chromium.org/867523002/)

Reason for revert:
Sorry for the mess - in the end, the original CL was causing the courgette_unittests failure.

Reverting the original again.
BUG=450912

Original issue's description:
> Revert of Revert of Isolate courgette_unittests (patchset #1 id:1 of https://codereview.chromium.org/865133002/)
>
> Reason for revert:
> The revert might have been wrong: reverting the revert again.
> BUG=450912
>
> Original issue's description:
> > Revert of Isolate courgette_unittests (patchset #1 id:1 of https://codereview.chromium.org/868433002/)
> >
> > Reason for revert:
> > http://crbug.com/450912
> >
> > courget_unittests is failing on Win7(dbg) bots since build#34639.
> > http://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29/builds/34639
> >
> > Original issue's description:
> > > Isolate courgette_unittests
> > >
> > > Adding link to http://www.chromium.org/developers/testing/isolated-testing/for-swes for my future self.
> > >
> > > R=maruel@chromium.org,jochen@chromium.org
> > > TBR=jam@chromium.org
> > > BUG=98637
> > >
> > > Committed: https://crrev.com/c9bd3b9a5667a36c05592ec9d16533be91b4567c
> > > Cr-Commit-Position: refs/heads/master@{#312531}
> >
> > TBR=jam@chromium.org,jochen@chromium.org,maruel@chromium.org,scottmg@chromium.org
> > NOPRESUBMIT=true
> > NOTREECHECKS=true
> > NOTRY=true
> > BUG=98637
> >
> > Committed: https://crrev.com/1bdeeeb5eae42e95f82806da9351d77a05403e67
> > Cr-Commit-Position: refs/heads/master@{#312571}
>
> TBR=jam@chromium.org,jochen@chromium.org,maruel@chromium.org,scottmg@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=98637
>
> Committed: https://crrev.com/217c53ca8128370c64a5d1a4ba15cb4cea5564ac
> Cr-Commit-Position: refs/heads/master@{#312577}

TBR=jam@chromium.org,jochen@chromium.org,maruel@chromium.org,scottmg@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=450912

Review URL: https://codereview.chromium.org/800333003

Cr-Commit-Position: refs/heads/master@{#312584}
5 files changed