Fix blocking issues related to flutter#1501

Merged

jcollins-g merged 9 commits intomasterfrom

field-flutter-misc

Sep 20, 2017

Commits on Sep 14, 2017

Commits on Sep 18, 2017

Test for MultiplyInheritedExecutableElement behavior
jcollins-g
committed
Strip out findShallowestInheritable and replace with preferredClass parameter passing
jcollins-g
committed

Commits on Sep 19, 2017