Commits
Craig Mautner authored and Jeff Brown committed 722285e199a
Make mirroring automatic based on Windows on display. Tell the display manager whenever a given logical display contains interesting windows. If so, then the display manager arranges to show that content on a physical display, otherwise it ignores the logical display and makes its associated primary physical display mirror the default display. Assign DisplayContents when Displays are added, remove them when Displays are removed, and update the DisplayInfo when Displays change. Change-Id: I36e08ec538055acabe1e24cdd12c40de4e47a158