Revert of Re-target wheel events only when a new scroll sequence has started.

Revert of Re-target wheel events only when a new scroll sequence has started. (patchset #7 id:220001 of https://codereview.chromium.org/2928793003/ )

Reason for revert:
Flaky on Android Tests buildbot.

First breaking build: https://uberchromegw.corp.google.com/i/chromium.linux/builders/Android%20Tests/builds/42822

Original issue's description:
> Re-target wheel events only when a new scroll sequence has started.
> 
> In RouteMouseWheelEvent, when a wheel event with phase began arrives,
> find the target for wheel event. While no wheel with phase end has
> arrived (during a scroll sequence) send the wheel events to the saved
> target.
> 
> In EventHandler, do the same targetting to dispatch the events to js.
> 
> BUG=526463
> TEST=WheelScrollLatchingBrowserTest.WheelEventTarget,
>      WheelScrollLatchingDisabledBrowserTest.WheelEventTarget
> 
> Review-Url: https://codereview.chromium.org/2928793003
> Cr-Commit-Position: refs/heads/master@{#480052}
> Committed: https://chromium.googlesource.com/chromium/src/+/8aa8c38005ee36bc441138c81a5cf165fb6514a5

TBR=bokan@chromium.org,tdresser@chromium.org,sahel@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=526463
Review-Url: https://codereview.chromium.org/2943183002
Cr-Commit-Position: refs/heads/master@{#480171}
Committed: https://chromium.googlesource.com/chromium/src/+/622b6164229bea82e61b916f5d9d41bc02b3488a

[nyquist, 2017-06-16 21:18:13]

The CQ bit was checked by nyquist@chromium.org

[nyquist, 2017-06-16 21:18:13]

Created Revert of Re-target wheel events only when a new scroll sequence has
started.

[commit-bot: I haz the power, 2017-06-16 21:18:30]

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, 2017-06-16 21:18:52]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497647893065910, "parent_rev":
"c97486f93ac2360cb9d7b8a29aa5a624da3fb2df", "commit_rev":
"622b6164229bea82e61b916f5d9d41bc02b3488a"}

[commit-bot: I haz the power, 2017-06-16 21:19:04]

Description was changed from

==========
Revert of Re-target wheel events only when a new scroll sequence has started.
(patchset #7 id:220001 of https://codereview.chromium.org/2928793003/ )

Reason for revert:
Flaky on Android Tests buildbot.

First breaking build:
https://uberchromegw.corp.google.com/i/chromium.linux/builders/Android%20Test...

Original issue's description:
> Re-target wheel events only when a new scroll sequence has started.
> 
> In RouteMouseWheelEvent, when a wheel event with phase began arrives,
> find the target for wheel event. While no wheel with phase end has
> arrived (during a scroll sequence) send the wheel events to the saved
> target.
> 
> In EventHandler, do the same targetting to dispatch the events to js.
> 
> BUG=526463
> TEST=WheelScrollLatchingBrowserTest.WheelEventTarget,
>      WheelScrollLatchingDisabledBrowserTest.WheelEventTarget
> 
> Review-Url: https://codereview.chromium.org/2928793003
> Cr-Commit-Position: refs/heads/master@{#480052}
> Committed:
https://chromium.googlesource.com/chromium/src/+/8aa8c38005ee36bc441138c81a5c...

TBR=bokan@chromium.org,tdresser@chromium.org,sahel@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=526463
==========

to

==========
Revert of Re-target wheel events only when a new scroll sequence has started.
(patchset #7 id:220001 of https://codereview.chromium.org/2928793003/ )

Reason for revert:
Flaky on Android Tests buildbot.

First breaking build:
https://uberchromegw.corp.google.com/i/chromium.linux/builders/Android%20Test...

Original issue's description:
> Re-target wheel events only when a new scroll sequence has started.
> 
> In RouteMouseWheelEvent, when a wheel event with phase began arrives,
> find the target for wheel event. While no wheel with phase end has
> arrived (during a scroll sequence) send the wheel events to the saved
> target.
> 
> In EventHandler, do the same targetting to dispatch the events to js.
> 
> BUG=526463
> TEST=WheelScrollLatchingBrowserTest.WheelEventTarget,
>      WheelScrollLatchingDisabledBrowserTest.WheelEventTarget
> 
> Review-Url: https://codereview.chromium.org/2928793003
> Cr-Commit-Position: refs/heads/master@{#480052}
> Committed:
https://chromium.googlesource.com/chromium/src/+/8aa8c38005ee36bc441138c81a5c...

TBR=bokan@chromium.org,tdresser@chromium.org,sahel@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=526463

Review-Url: https://codereview.chromium.org/2943183002
Cr-Commit-Position: refs/heads/master@{#480171}
Committed:
https://chromium.googlesource.com/chromium/src/+/622b6164229bea82e61b916f5d9d...
==========

[commit-bot: I haz the power, 2017-06-16 21:19:06]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/622b6164229bea82e61b916f5d9d...