ozone: evdev: Fix ghost touches aligned with first touch

ozone: evdev: Fix ghost touches aligned with first touch

The ABS_X and ABS_Y axes are not part of the MT protocol and should
therefore not be used to update MT slot positions.

The symptom of this was secondary touches warping to the position of the
first touch in the X and/or Y axis, since ABS_X/Y always corresponds to
the first touch.

BUG=407386
TEST=chrome on pixel with --ash-touch-hud
NOTRY=true

Committed: https://crrev.com/86c315c379bfeefe3dd833cee678a41ac6884a74
Cr-Commit-Position: refs/heads/master@{#292263}

[spang, 2014-08-26 22:21:11]

spang@chromium.org changed reviewers:
+ alexst@chromium.org, miletus@chromium.org

[Yufeng Shen (Slow to review), 2014-08-26 23:32:15]

miletus@chromium.org changed reviewers:
+ sadrul@chromium.org

[alexst (slow to review), 2014-08-27 00:13:04]

Does anyone care about ABS_X/Y? explicitly?

If not, lgtm.

[sadrul, 2014-08-27 01:37:22]

LGTM A test in touch_event_converter_evdev_unittest.cc?

[spang, 2014-08-27 05:29:30]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2014-08-27 05:30:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/spang@chromium.org/506303002/1

[spang, 2014-08-27 05:33:18]

The CQ bit was unchecked by spang@chromium.org

[spang, 2014-08-27 23:05:23]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2014-08-27 23:07:11]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/spang@chromium.org/506303002/20001

[commit-bot: I haz the power, 2014-08-27 23:11:44]

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

[commit-bot: I haz the power, 2014-08-27 23:11:45]

Failed to commit the patch.

[spang, 2014-08-27 23:15:21]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2014-08-27 23:16:37]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/spang@chromium.org/506303002/20001

[commit-bot: I haz the power, 2014-08-27 23:18:14]

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

[commit-bot: I haz the power, 2014-08-27 23:18:15]

Failed to commit the patch.

[alexst (slow to review), 2014-08-27 23:20:26]

The CQ bit was checked by alexst@chromium.org

[commit-bot: I haz the power, 2014-08-27 23:21:53]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/spang@chromium.org/506303002/20001

[commit-bot: I haz the power, 2014-08-27 23:23:09]

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

[commit-bot: I haz the power, 2014-08-27 23:23:10]

Failed to commit the patch.

[spang, 2014-08-27 23:23:42]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2014-08-27 23:24:45]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/spang@chromium.org/506303002/20001

[spang, 2014-08-27 23:24:49]

The CQ bit was unchecked by spang@chromium.org

[spang, 2014-08-27 23:24:49]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2014-08-27 23:26:07]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/spang@chromium.org/506303002/20001

[commit-bot: I haz the power, 2014-08-27 23:27:36]

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

[commit-bot: I haz the power, 2014-08-27 23:27:37]

Failed to commit the patch.

[spang, 2014-08-27 23:30:37]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2014-08-27 23:32:22]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/spang@chromium.org/506303002/20001

[commit-bot: I haz the power, 2014-08-27 23:34:23]

Committed patchset #2 (id:20001) as f59f314d1929edc62c5873858fa96308f75738d5

[commit-bot: I haz the power, 2014-09-10 02:55:28]

Patchset 2 (id:??) landed as
https://crrev.com/86c315c379bfeefe3dd833cee678a41ac6884a74
Cr-Commit-Position: refs/heads/master@{#292263}