Change exclusive access popup behaviour with simplified-fullscreen-ui.
With the simplified-fullscreen-ui flag enabled, the popup behaves as
follows:
- Now waits for a short period (500ms) of inactivity, then more activity,
before displaying the initial bubble.
- The popup remains active for 2.3s, then hides as long as the user is
not mousing over the top part of the screen.
- After a long period (1m) of inactivity, then more activity, displays
the bubble again.
Design document:
https://docs.google.com/document/d/10Hm6dstWEY9sOdbENijz70I6Tnbz91mPkNKeteMJ-Kw/edit#
BUG=352425
Review URL: https://codereview.chromium.org/
1254543002
Cr-Commit-Position: refs/heads/master@{#342058}