Bugzilla

I can see a regression in the  load time on try with the reverted and base patch most evident when looking at `welcome loadtime opt cold fission webrender`:
[original patch - 144.5ms](https://treeherder.mozilla.org/jobs?repo=try&author=nsauermann%40mozilla.com&selectedTaskRun=LjImoJK0Tneia4heawJ5WQ.0)
[completely reverted try run - 70.1ms](https://treeherder.mozilla.org/jobs?repo=try&author=nsauermann%40mozilla.com&selectedTaskRun=fjPvA2O0RIya5UxGVVQ3Dg.0)

Culprit seems to be the changes to removing [ShellServices calls](https://treeherder.mozilla.org/jobs?repo=try&author=nsauermann%40mozilla.com&selectedTaskRun=F4RveM4RS3Sk_Z9N7IEJoA.0) as previous try run shows reduction in ms 


Doing one more [try run to confirm this](https://treeherder.mozilla.org/jobs?repo=try&revision=d768e2121d5c2f488f901aa3743f3dde3490e92b) with the ShellService calls reverted.

I'm not sure what the best way to proceed is since we no longer require those calls? NI'ing Ed/Punam for feedback.

I can see a regression in the  load time on try with the reverted and base patch most evident when looking at `welcome loadtime opt cold fission webrender`:
[original patch - 144.5ms](https://treeherder.mozilla.org/jobs?repo=try&author=nsauermann%40mozilla.com&selectedTaskRun=LjImoJK0Tneia4heawJ5WQ.0)
[completely reverted try run - 70.1ms](https://treeherder.mozilla.org/jobs?repo=try&author=nsauermann%40mozilla.com&selectedTaskRun=fjPvA2O0RIya5UxGVVQ3Dg.0)

Culprit seems to be the changes to removing [ShellServices calls](https://treeherder.mozilla.org/jobs?repo=try&author=nsauermann%40mozilla.com&selectedTaskRun=F4RveM4RS3Sk_Z9N7IEJoA.0) as this try run shows reduction in ms back to before values


Doing one more [try run to confirm this](https://treeherder.mozilla.org/jobs?repo=try&revision=d768e2121d5c2f488f901aa3743f3dde3490e92b) with the ShellService calls reverted.

I'm not sure what the best way to proceed is since we no longer require those calls? NI'ing Ed/Punam for feedback.