Fix sample modifier keys for mouse events

Bug: skia:
Change-Id: I0fc4f15abc44ff0a1b6b92e238e7abda35e7bacb
Reviewed-on: https://skia-review.googlesource.com/79904
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed