GitLab

Use placeholder ordinal ids for now (0, 1, 2, ...); update tests.
TODO: generate per-origin UUIDs that reset when cookies are deleted

Test Screen.id values returned via window.getScreens() with:
 chrome://flags#enable-experimental-web-platform-features OR
 $ chrome --enable-blink-features=ScreenEnumeration
Try https://michaelwasserman.github.io/window-placement-demo

Bug: 994889
Test: Automated, Screen.id placeholder values
Change-Id: I0c5b18b92fef251211822f3473ea85472a7ee945
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2155113Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Michael Wasserman <msw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#761040}