Reset scroll status when a fling is ignored

Reset scroll status when a fling is ignored

In WebView, flings that target the root scrolling layer are ignored by
the compositor. In this case, we failed to clean up the scroll state in
InputHandlerProxy, leading it to believe that a scroll was still active
after the fling had been ignored. Handle this case, resetting the scroll
activity bit when a fling is ignored.

BUG=469369
Committed: https://crrev.com/cbee85393427388bf1e24919d4ff5b1a883c3e03
Cr-Commit-Position: refs/heads/master@{#321932}

[jdduke (slow), 2015-03-21 01:21:07]

jdduke@chromium.org changed reviewers:
+ bokan@chromium.org

[jdduke (slow), 2015-03-21 01:21:08]

bokan@: PTAL, thanks.

[jdduke (slow), 2015-03-24 01:16:13]

jdduke@chromium.org changed reviewers:
+ aelias@chromium.org
- bokan@chromium.org

[jdduke (slow), 2015-03-24 01:16:13]

+aelias for review (bokan@ to cc, sorry, but this appears to be interrupting
WebView devs rather frequently and I'd like to land it soon).

[aelias_OOO_until_Jul13, 2015-03-24 01:20:32]

lgtm

[jdduke (slow), 2015-03-24 01:21:00]

On 2015/03/24 01:20:32, aelias wrote:
> lgtm

thanks!

[jdduke (slow), 2015-03-24 01:21:02]

The CQ bit was checked by jdduke@chromium.org

[commit-bot: I haz the power, 2015-03-24 01:21:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1028533004/20001

[commit-bot: I haz the power, 2015-03-24 02:40:42]

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

[commit-bot: I haz the power, 2015-03-24 02:40:43]

Try jobs failed on following builders:
  linux_chromium_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[jdduke (slow), 2015-03-24 03:57:39]

The CQ bit was checked by jdduke@chromium.org

[commit-bot: I haz the power, 2015-03-24 03:57:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1028533004/20001

[commit-bot: I haz the power, 2015-03-24 04:31:34]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-24 04:32:42]

Patchset 2 (id:??) landed as
https://crrev.com/cbee85393427388bf1e24919d4ff5b1a883c3e03
Cr-Commit-Position: refs/heads/master@{#321932}