Enable multiple touch in WebView.

Enable multiple touch in WebView.

WebView touches are aggressively disabled by the
overscroll_actions_controller once a single touch begins to move. This
seems unnecessary and it breaks multi-touch within the webView.

TEST=See bug for replication steps to test multitouch. Also ensure
overscroll actions perform as expected, ensure that user interaction
with the webpage does not occur while the overscroll actions are
visible. Ex: Pull to refresh.
BUG=715120
Review-Url: https://codereview.chromium.org/2924903003
Cr-Commit-Position: refs/heads/master@{#478298}
Committed: https://chromium.googlesource.com/chromium/src/+/feecd1919ed0b1e35e8262f540cf884e8719adc7

[michaeldo, 2017-06-06 21:50:53]

michaeldo@chromium.org changed reviewers:
+ jif@chromium.org

[michaeldo, 2017-06-06 21:50:54]

PTAL. I'm not sure if this is the best way to handle it as I don't have the full
context of why we disable touches at all, but it does seem to help with
multi-touch interactions and I didn't notice any broken behavior.

[jif, 2017-06-09 12:24:18]

Didn't notice anything wrong either.

lgtm

[michaeldo, 2017-06-09 15:56:28]

The CQ bit was checked by michaeldo@chromium.org

[commit-bot: I haz the power, 2017-06-09 15:56:43]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-09 16:12:01]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497023788911630, "parent_rev":
"8214bacc307012249e0628661907781214e1c8e1", "commit_rev":
"feecd1919ed0b1e35e8262f540cf884e8719adc7"}

[commit-bot: I haz the power, 2017-06-09 16:12:11]

Description was changed from

==========
Enable multiple touch in WebView.

WebView touches are aggressively disabled by the
overscroll_actions_controller once a single touch begins to move. This
seems unnecessary and it breaks multi-touch within the webView.

TEST=See bug for replication steps to test multitouch. Also ensure
overscroll actions perform as expected, ensure that user interaction
with the webpage does not occur while the overscroll actions are
visible. Ex: Pull to refresh.
BUG=715120
==========

to

==========
Enable multiple touch in WebView.

WebView touches are aggressively disabled by the
overscroll_actions_controller once a single touch begins to move. This
seems unnecessary and it breaks multi-touch within the webView.

TEST=See bug for replication steps to test multitouch. Also ensure
overscroll actions perform as expected, ensure that user interaction
with the webpage does not occur while the overscroll actions are
visible. Ex: Pull to refresh.
BUG=715120

Review-Url: https://codereview.chromium.org/2924903003
Cr-Commit-Position: refs/heads/master@{#478298}
Committed:
https://chromium.googlesource.com/chromium/src/+/feecd1919ed0b1e35e8262f540cf...
==========

[commit-bot: I haz the power, 2017-06-09 16:12:13]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/feecd1919ed0b1e35e8262f540cf...