Revert of Revert of Revert of Disable telemetry tests for Mac 10.9. (…

…patchset #1 id:1 of https://codereview.chromium.org/751533002/)

Reason for revert:
Failures fixed in https://codereview.chromium.org/720413006/, these tests pass locally for me on Mac 10.9

Original issue's description:
> Revert of Revert of Disable telemetry tests for Mac 10.9. (patchset #1 id:1 of https://codereview.chromium.org/744283002/)
>
> Reason for revert:
> This re-enabling of tests has left a trail of redness on Mac 10.9 (more than one failure). If you expect tests to fail as a result of re-enabling again, then please watch the tree and disable the ones failing (assuming that is the appropriate course of action in the first place, which I'm not sure of).
>
> Original issue's description:
> > Revert of Disable telemetry tests for Mac 10.9. (patchset #2 id:20001 of https://codereview.chromium.org/706703003/)
> >
> > Reason for revert:
> > Second attempt to re-enable tests. I think there may still be one test failure, but we can disable that one test. If there's more than one, revert this.
> >
> > Original issue's description:
> > > Disable telemetry tests for Mac 10.9.
> > >
> > > The telemetry tests are failing consistently on OSX 10.9.
> > >
> > > BUG=420615
> > > R=tonyg@chromium.org
> > >
> > > Committed: https://crrev.com/5503de1eeae0437c1f8160d69b04d6241bc5e974
> > > Cr-Commit-Position: refs/heads/master@{#303114}
> >
> > TBR=phajdan.jr@chromium.org,tonyg@chromium.org,garykac@chromium.org
> > NOTREECHECKS=true
> > NOTRY=true
> > BUG=420615
> >
> > Committed: https://crrev.com/10e58e6dfbe4d9dae5841ceb9eb0180cce1aac14
> > Cr-Commit-Position: refs/heads/master@{#305096}
>
> TBR=phajdan.jr@chromium.org,tonyg@chromium.org,garykac@chromium.org,dtu@chromium.org
> NOTREECHECKS=true
> NOTRY=true
> BUG=420615
>
> Committed: https://crrev.com/8ef425c1d3058afabd36fd9226385c142ba5f280
> Cr-Commit-Position: refs/heads/master@{#305200}

TBR=phajdan.jr@chromium.org,tonyg@chromium.org,garykac@chromium.org,dtu@chromium.org,finnur@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=420615

Review URL: https://codereview.chromium.org/734433004

Cr-Commit-Position: refs/heads/master@{#306430}

testing/buildbot/chromium.mac.json

@@ -279,6 +279,14 @@
       "url_unittests"
     ],
     "scripts": [
+      {
+        "name": "telemetry_unittests",
+        "script": "telemetry_unittests.py"
+      },
+      {
+        "name": "telemetry_perf_unittests",
+        "script": "telemetry_perf_unittests.py"
+      },
       {
         "name": "nacl_integration",
         "script": "nacl_integration.py"
@@ -370,6 +378,14 @@
       "url_unittests"
     ],
     "scripts": [
+      {
+        "name": "telemetry_unittests",
+        "script": "telemetry_unittests.py"
+      },
+      {
+        "name": "telemetry_perf_unittests",
+        "script": "telemetry_perf_unittests.py"
+      },
       {
         "name": "nacl_integration",
         "script": "nacl_integration.py"