chrome/android: Consume down events for mouse drag gesture.

chrome/android: Consume down events for mouse drag gesture.

Mouse drag gestures on android are delivered using a stream of
ACTION_MOVE events. If the view does not consume the ACTION_DOWN event
that starts the gesture, it will not receive the following move events.

Consume this event in the EventForwarder to ensure the ContentView gets
the complete gesture.

BUG=714845
Review-Url: https://codereview.chromium.org/2842823002
Cr-Commit-Position: refs/heads/master@{#467780}
Committed: https://chromium.googlesource.com/chromium/src/+/6bc101ebf27a7a56f28d5264aed265ec43a8db45

[Khushal, 2017-04-25 21:30:10]

khushalsagar@chromium.org changed reviewers:
+ aelias@chromium.org

[Khushal, 2017-04-25 21:30:11]

This fixes the drag by basically restoring the behaviour the EventHandler was
providing.
Also, I do see a crash on native build once you move and release after the drag
because of an ACTION_OUTSIDE being sent to native. But that existed earlier as
well. So I figured something to fix in a subsequent patch.

[aelias_OOO_until_Jul13, 2017-04-26 00:35:54]

Looks OK, but let me know if you find a way to make it work in WebView as well.

[aelias_OOO_until_Jul13, 2017-04-26 23:56:24]

The CQ bit was checked by aelias@chromium.org to run a CQ dry run

[aelias_OOO_until_Jul13, 2017-04-26 23:57:12]

aelias@chromium.org changed reviewers:
+ dtrainor@chromium.org

[commit-bot: I haz the power, 2017-04-26 23:57:31]

Dry run: CQ is trying da patch.

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

[aelias_OOO_until_Jul13, 2017-04-26 23:57:54]

Hmm, we're short of ideas for how to actually make it work for WebView for now,
so since this is a regression fix, let's get this landed I guess.  lgtm,
+dtrainor for OWNERS.

[commit-bot: I haz the power, 2017-04-27 04:29:18]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-04-27 04:29:19]

Dry run: This issue passed the CQ dry run.

[Khushal, 2017-04-27 18:59:27]

On 2017/04/26 23:57:54, aelias wrote:
> Hmm, we're short of ideas for how to actually make it work for WebView for
now,
> so since this is a regression fix, let's get this landed I guess.  lgtm,
> +dtrainor for OWNERS.

As it turns out, I wasn't overriding the system webview when testing this
correctly...But the good news is that this change fixes Webview as well. \o/

[David Trainor- moved to gerrit, 2017-04-27 19:19:25]

lgtm

[Khushal, 2017-04-27 19:20:09]

The CQ bit was checked by khushalsagar@chromium.org

[commit-bot: I haz the power, 2017-04-27 19:32:52]

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, 2017-04-27 20:46:08]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493320809356520, "parent_rev":
"da877aa6097d48a901ef697e62f9796089c57d3a", "commit_rev":
"6bc101ebf27a7a56f28d5264aed265ec43a8db45"}

[commit-bot: I haz the power, 2017-04-27 20:46:15]

Description was changed from

==========
chrome/android: Consume down events for mouse drag gesture.

Mouse drag gestures on android are delivered using a stream of
ACTION_MOVE events. If the view does not consume the ACTION_DOWN event
that starts the gesture, it will not receive the following move events.

Consume this event in the EventForwarder to ensure the ContentView gets
the complete gesture.

BUG=714845
==========

to

==========
chrome/android: Consume down events for mouse drag gesture.

Mouse drag gestures on android are delivered using a stream of
ACTION_MOVE events. If the view does not consume the ACTION_DOWN event
that starts the gesture, it will not receive the following move events.

Consume this event in the EventForwarder to ensure the ContentView gets
the complete gesture.

BUG=714845

Review-Url: https://codereview.chromium.org/2842823002
Cr-Commit-Position: refs/heads/master@{#467780}
Committed:
https://chromium.googlesource.com/chromium/src/+/6bc101ebf27a7a56f28d5264aed2...
==========

[commit-bot: I haz the power, 2017-04-27 20:46:16]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/6bc101ebf27a7a56f28d5264aed2...