Michael Goderbauer 0774c5194b Add SemanticsNode.isSelected flag (#10610)
* Add SemanticsNode.isSelected flag

* Adds example usage to TabBar

See also https://github.com/flutter/engine/pull/3764

* Review comments

* whitespace fixes

* Fix doc ref and update engine roll
2017-06-13 10:51:17 -07:00
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2017-04-12 15:06:12 -07:00