[EoC] Allow sheet to cover contextual search when toolbar button enabled

Allow the bottom sheet to be displayed when contextual search is showing
and the toolbar button is enabled. The sheet covers the composited UI
when the EoC button is pressed.


Change-Id: I8eeef01d66cceec31d3ebf35351bd958ce962809
Reviewed-on: https://chromium-review.googlesource.com/1141166
Commit-Queue: Theresa <twellington@chromium.org>
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576223}
4 files changed