Fix scrolling rails on Mac OSX.

Fix scrolling rails on Mac OSX.

Scrolling wasn't snapping to the rails on Mac. Force the
opposite co-ordinate to 0 if rail mode is enabled.

BUG=597262
Committed: https://crrev.com/79ea645e3fa455cc7829539547dc59ce587f92db
Cr-Commit-Position: refs/heads/master@{#383620}

[dtapuska, 2016-03-24 21:08:30]

Description was changed from

==========
Fix scrolling rails on mac.

Scrolling wasn't snapping to the rails on Mac. Force the
opposite co-ordinate to 0 if rail mode is enabled.

BUG=597262
==========

to

==========
Fix scrolling rails on Mac OSX.

Scrolling wasn't snapping to the rails on Mac. Force the
opposite co-ordinate to 0 if rail mode is enabled.

BUG=597262
==========

[dtapuska, 2016-03-24 21:08:41]

dtapuska@chromium.org changed reviewers:
+ aelias@chromium.org

[aelias_OOO_until_Jul13, 2016-03-28 22:05:19]

lgtm

[dtapuska, 2016-03-28 22:53:20]

The CQ bit was checked by dtapuska@chromium.org

[commit-bot: I haz the power, 2016-03-28 22:53:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1833013002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1833013002/1

[commit-bot: I haz the power, 2016-03-29 00:02:21]

Description was changed from

==========
Fix scrolling rails on Mac OSX.

Scrolling wasn't snapping to the rails on Mac. Force the
opposite co-ordinate to 0 if rail mode is enabled.

BUG=597262
==========

to

==========
Fix scrolling rails on Mac OSX.

Scrolling wasn't snapping to the rails on Mac. Force the
opposite co-ordinate to 0 if rail mode is enabled.

BUG=597262
==========

[commit-bot: I haz the power, 2016-03-29 00:02:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-29 00:06:01]

Description was changed from

==========
Fix scrolling rails on Mac OSX.

Scrolling wasn't snapping to the rails on Mac. Force the
opposite co-ordinate to 0 if rail mode is enabled.

BUG=597262
==========

to

==========
Fix scrolling rails on Mac OSX.

Scrolling wasn't snapping to the rails on Mac. Force the
opposite co-ordinate to 0 if rail mode is enabled.

BUG=597262

Committed: https://crrev.com/79ea645e3fa455cc7829539547dc59ce587f92db
Cr-Commit-Position: refs/heads/master@{#383620}
==========

[commit-bot: I haz the power, 2016-03-29 00:06:02]

Patchset 1 (id:??) landed as
https://crrev.com/79ea645e3fa455cc7829539547dc59ce587f92db
Cr-Commit-Position: refs/heads/master@{#383620}