cros: Make RootWindowController use right menus

UX requests menus prefer right, not above.

In reference to the menu's anchor rect:
Above prefers in order:
 - Above and right.
 - Below and left
 - Below and right.

Right prefers in order:
 - Above and right
 - Below and right
 - Below and left.


Bug: 924367
Change-Id: Ida7a24703c97d9a13bc13f387c1ef70416ff8fa7
Reviewed-on: https://chromium-review.googlesource.com/c/1428560
Auto-Submit: Alex Newcomer <newcomer@chromium.org>
Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625226}
1 file changed