Add delay to FakeDisplayDelegate::Configure().

Display configuration takes some time on real devices. Add in a 200ms
delay from when Configure() is called to when the callback is triggered
so off device timing is similar to on device timing.

BUG=none

Review-Url: https://codereview.chromium.org/2527263002
Cr-Commit-Position: refs/heads/master@{#435553}
2 files changed