State update of Parent (not Owner) does not render the children - 0.14

[rrag]

say

var Owner = React.createClass({
  render: function () {
    return <Parent><Child foo="bar"/></Parent>
})

When Owner state is updated, the render function is called on Owner, Parent and Child.
When Parent state is updated, the render function of Parent is called, but not on the Child.

This was the expected behavior till 0.13.x, but with #2112 introduced a behavior where Parent state update can change the return of getChildContext and hence the Child needs an update.

jsbin explaining the problem.

Owner state update, renders both Parent and Child
Parent state update renders only the Parent

[sophiebits]

See #2517.