Change default selection in getDisplayMedia to cancel

To prevent permissions being accepted accidentally, permission prompts should
not be accepted as the default action. This CL changes default selection to
cancel button to reflect that.

Bug: 326740
Change-Id: I29d3e5c61c6a56546c7d9ada0824d3fccb91bc4f
Reviewed-on: https://chromium-review.googlesource.com/c/1334856
Reviewed-by: Christopher Thompson <cthomp@chromium.org>
Reviewed-by: Qiang Chen <qiangchen@chromium.org>
Commit-Queue: Emircan Uysaler <emircan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608064}
3 files changed