GitLab

This enables touch interaction with the web contents, effectively
enabling long press, drag, selection, etc.

Context menu and selection handles are disabled for VR in this CL.

Bug: 842916, 733656, 848740
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel;luci.chromium.try:linux_vr
Change-Id: If50401ddbc130abde697b57d580bc492de2c4dda
Reviewed-on: https://chromium-review.googlesource.com/1091281
Commit-Queue: Aldo Culquicondor <acondor@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Timothy Dresser <tdresser@chromium.org>
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567745}