Winson Chung fef8cfc3f0 Merge changes I1bad66e2,Ibc93597e,Id985fc28 into nyc-dev
* changes:
  Remove the highlight on the overview button in the screen pinning dialog
  Fixing bad regression in alt-tab layout.
  Workaround to ensure that a SystemUI process is always available.
2016-04-06 17:50:31 +00:00
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