Fix issue with hit testing on the layer tree.

Fix issue with hit testing on the layer tree.

When wheel event listeners were moved to the layer tree instead of
on individual layers in https://codereview.chromium.org/1639363002

We should have stopped hit testing on whether there was a wheel
event listener or not. These properties are checked on the general
page before processing the event.

BUG=597913
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1843813002

Cr-Commit-Position: refs/heads/master@{#383872}
(cherry picked from commit 913f48327c7c50fa79df5af74d68fc7af7d3e2f4)

Committed: https://chromium.googlesource.com/chromium/src/+/8a65242bf4cadef0413ced54175c075532c2ef27

[dtapuska, 2016-04-05 18:09:45]

Description was changed from

==========
Fix issue with hit testing on the layer tree.

When wheel event listeners were moved to the layer tree instead of
on individual layers in https://codereview.chromium.org/1639363002

We should have stopped hit testing on whether there was a wheel
event listener or not. These properties are checked on the general
page before processing the event.

BUG=597913
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1843813002

Cr-Commit-Position: refs/heads/master@{#383872}
(cherry picked from commit 913f48327c7c50fa79df5af74d68fc7af7d3e2f4)
==========

to

==========
Fix issue with hit testing on the layer tree.

When wheel event listeners were moved to the layer tree instead of
on individual layers in https://codereview.chromium.org/1639363002

We should have stopped hit testing on whether there was a wheel
event listener or not. These properties are checked on the general
page before processing the event.

BUG=597913
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1843813002

Cr-Commit-Position: refs/heads/master@{#383872}
(cherry picked from commit 913f48327c7c50fa79df5af74d68fc7af7d3e2f4)

Committed:
https://chromium.googlesource.com/chromium/src/+/8a65242bf4cadef0413ced54175c...
==========

[dtapuska, 2016-04-05 18:09:46]

Committed patchset #1 (id:1) manually as
8a65242bf4cadef0413ced54175c075532c2ef27.