Re-activate touch selection after fling

Re-activate touch selection after fling

Currently, when a scroll starts touch selection handles are hidden and
then re-shown after scroll ends. But, if scroll ends in a fling, handles
are not re-shown, because there hadn't been a way to determine end of
the fling. Now that there is an IPC message notifying end of flings, we
can re-show handles after a fling.

BUG=413927
Committed: https://crrev.com/a8248c9e315b285492395fe1e3ce6f0b9cb816e6
Cr-Commit-Position: refs/heads/master@{#294927}

[mohsen, 2014-09-15 18:01:53]

mohsen@chromium.org changed reviewers:
+ sky@chromium.org

[mohsen, 2014-09-15 18:01:53]

Please take a look...

[sky, 2014-09-15 19:41:44]

LGTM

[mohsen, 2014-09-15 21:54:55]

The CQ bit was checked by mohsen@chromium.org

[commit-bot: I haz the power, 2014-09-15 22:04:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/569863003/20001

[commit-bot: I haz the power, 2014-09-15 23:44:53]

Committed patchset #2 (id:20001) as eef36d80b758fcaf021f9e2f9a6a68a7e52c8565

[commit-bot: I haz the power, 2014-09-15 23:48:33]

Patchset 2 (id:??) landed as
https://crrev.com/a8248c9e315b285492395fe1e3ce6f0b9cb816e6
Cr-Commit-Position: refs/heads/master@{#294927}