Save slider preferences when using touch.

Save slider preferences when using touch.

On the Settings page, when you change a slider (input type="range") by
touch, we don't save the associated preference.

Listen to touchend and touchcancel, and add a test for this.

BUG=394938
R=estade@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284292

[Evan Stade, 2014-07-18 18:32:49]

lgtm

[michaelpg, 2014-07-18 18:38:56]

The CQ bit was checked by michaelpg@chromium.org

[commit-bot: I haz the power, 2014-07-18 18:41:00]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/michaelpg@chromium.org/400993003/1

[commit-bot: I haz the power, 2014-07-18 22:10:07]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)
  mac_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_rel/buil...)
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[commit-bot: I haz the power, 2014-07-18 23:20:58]

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

[commit-bot: I haz the power, 2014-07-18 23:20:59]

Try jobs failed on following builders:
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)

[michaelpg, 2014-07-18 23:44:29]

The CQ bit was checked by michaelpg@chromium.org

[commit-bot: I haz the power, 2014-07-18 23:46:15]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/michaelpg@chromium.org/400993003/20001

[commit-bot: I haz the power, 2014-07-19 02:49:57]

Change committed as 284292