Target FPS line label should adjust to FPS target.

[kenzieschmoll]

For a 60 FPS device, the label "16ms" is aligned with the target line:

For a 90 FPS device, the label "11ms" is not.

The vertical positioning of this label should be calculated based on the target FPS.

[pq]

Closing as the perf view has been removed in favor of embedded devtools.