commit db03912d71a957bb38762ad6edf8b0c8b63589ca
author David Black <dmblack@google.com> Thu Aug 16 22:36:51 2018
committer Commit Bot <commit-bot@chromium.org> Thu Aug 16 22:36:51 2018
tree c3af8b3b01989be58df060574295a66fa29e4b8a
parent 1b331d20e1f35829e568af957ca9bd4884f0734c

Handle vertical scrolling with embedded WebViews.

Previously, Assistant cards (WebViews) would consume any event that
they processed. This prevented our container from scrolling effectively,
because scroll gestures would be consumed.

Now, we prevent the WebView from receiving anything other than
mouse click related events. We need to give it those events because
Assistant cards contain links.

To also support link taps via gesture, we need to route taps back
to the WebView's manually. We do this by converting tap gestures into
mouse events.

Bug: b:110039692
Change-Id: Id0d44af0651490ddf58b6e0e0c70c41fec3fa654
Reviewed-on: https://chromium-review.googlesource.com/1174961
Commit-Queue: David Black <dmblack@google.com>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583863}