Update from https://crrev.com/304715

Includes patches to sky/viewer/cc/ and ui/compositor/ for the following:

cc: Toggle LCD text at raster time instead of record time.
https://codereview.chromium.org/684543006
https://crrev.com/304623

and

Make Keyframe use TimeTicks/TimeDelta to represent time instead of double.
https://codereview.chromium.org/719453007
https://crrev.com/304612

Review URL: https://codereview.chromium.org/737943002