Fix infobar scrolling.

Fix infobar scrolling.

The infobar container became non-scrollable because InfoBarContainer now
ignores all touch events in InfoBarContainer.onTouch(). These touch
events need to be swallowed to prevent them from reaching the webpage,
but they should be swallowed in ContentWrapperView, not in
InfoBarContainer, so that InfoBarContainer (which extends ScrollView)
can be scrolled.

The offending CL: https://codereview.chromium.org/824763002

BUG=453103
Committed: https://crrev.com/7ef78075948121486f0061d3f75418d0dfda284c
Cr-Commit-Position: refs/heads/master@{#313668}

[newt (away), 2015-01-29 02:37:33]

newt@chromium.org changed reviewers:
+ aurimas@chromium.org

[newt (away), 2015-01-29 02:37:33]

PTAL

[newt (away), 2015-01-29 03:35:46]

PTAL again (looks like you lgtm'd the wrong CL before)

[aurimas (slooooooooow), 2015-01-29 04:23:41]

lgtm

[newt (away), 2015-01-29 04:42:45]

The CQ bit was checked by newt@chromium.org

[commit-bot: I haz the power, 2015-01-29 04:43:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/872113003/20001

[commit-bot: I haz the power, 2015-01-29 05:19:42]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-01-29 05:20:52]

Patchset 2 (id:??) landed as
https://crrev.com/7ef78075948121486f0061d3f75418d0dfda284c
Cr-Commit-Position: refs/heads/master@{#313668}