Add chrome://flags for features::kEnableVizHitTestSurfaceLayer

This CL adds a chrome flag for viz hit test surface layer version (v2
hit testing). This is the next version of the currently enabled viz hit
test draw quad version (v1 hit testing).

It added a param flag for both v1 and v2.

Bug: 874919
Change-Id: I5716d13e1e93ebc6c4042fbb271b5fab50698ed3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1543458
Reviewed-by: Ria Jiang <riajiang@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Robert Flack <flackr@chromium.org>
Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Commit-Queue: Xianda Sun <sunxd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#650902}