Ensures first frame is loaded before capturing frames with Chameleon.

+
Use chameleon video image comparison tests on daisy and pit.

Sometimes chameleon starts capturing frames before the video displays
the first frame. This would cause the first frame to be totally white.

At other times the capturing would start after the video has loaded.

Make this deterministic by playing the video, pausing it, and then
going back to '0' current time.

BUG=chromium:418217
TEST=Tested on jerry that was previously failing.
    = Tested on daisy and pit.

Change-Id: I064a20eb345c8321add8db498b18c58ade5ae211
Reviewed-on: https://chromium-review.googlesource.com/274530
Reviewed-by: Mussa Kiroga <mussa@chromium.org>
Tested-by: Mussa Kiroga <mussa@chromium.org>
Commit-Queue: Aviv Keshet <akeshet@chromium.org>
6 files changed