Handful of tweaks for tab dragging with touch:

Handful of tweaks for tab dragging with touch:
. Trigger scrolling of visible tabs on a gesture.
. Make sure scrolling of visible tabs is triggered if the tabstrip
  isn't overflowing.
. Fixes capture issues when used under aura.
. Triggers switching from scroll visible to reorder in a couple of
  situations.
. Increases the vertical distance before detaching with touch and make
  it so that you can't detach when dragging only horizontally.
. Adds tests for touch code path.

BUG=140606
TEST=covered by tests
R=ben@chromium.org


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=150481

[Ben Goodger (Google), 2012-08-07 18:21:53]

lgtm

[commit-bot: I haz the power, 2012-08-07 19:40:33]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sky@chromium.org/10824200/2001

[commit-bot: I haz the power, 2012-08-07 22:21:03]

Try job failure for 10824200-2001 (retry) on win_rel for step
"interactive_ui_tests".
It's a second try, previously, step "interactive_ui_tests" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2012-08-08 00:19:25]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sky@chromium.org/10824200/5002

[commit-bot: I haz the power, 2012-08-08 01:57:19]

Change committed as 150481