Hedger Wang 7f54506f96 <Navigator />: Fix the getter for navigationContext.
Summary:
@public
The current getter for `navigationContext` always return a static
context, and it should return an instance-based one, instead.

Test Plan:
Use console.log() in inspect that two different navigators do
have their own `navigationContext` created.
2015-06-22 12:02:55 -08:00
..