Status is added to pinch zoom gesture

Pinch zoom gesture must indicates if it is GESTURES_ZOOM_START,
GESTURES_ZOOM_UPDATE, or GESTURES_ZOOM_END. The status is added to
the struct, but still it does not have a full support in gesture
library. Right now, the status is always GESTURES_ZOOM_UPDATE.
This CL is submitted to unblock chromium:410580.

BUG=chromium:569939
TEST=Manually tested

Change-Id: Ia3ec68acfac80302fdb0db693842f11652174c40
Reviewed-on: https://chromium-review.googlesource.com/322471
Commit-Ready: Amirhossein Simjour <asimjour@chromium.org>
Tested-by: Amirhossein Simjour <asimjour@chromium.org>
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
3 files changed