ReactTextComponent's implementation is DOM-specific; instead of flattenChildren creating the ReactTextComponent instances, ReactNativeComponent now takes care of having ReactTextComponent injected and creating the component instance. I also renamed ReactTextComponent to ReactDOMTextComponent and moved it to browser/ui/ where it belongs. ReactDOMTextComponent no longer inherits directly from ReactComponent and instead implements construct and {mount,receive,unmount}Component directly.
This diff removes `ReactTestUtils.isTextComponent` which should have previously never returned true when using public APIs.
Test Plan: jest, use ballmer-peak example.
The second argument of mockComponent was listed as tagName, but referred to in the description as mockTagName. I changed the first one to mockTagName to be consistent.
Petri Lehtinen
Martin Jul
Ben Alpert
Ivan Krechetov
Sebastian Markbage
Jesse Skinner
Paul O’Shannessy
Jim OBrien
Kyle Mathews
Kunal Mehta
Dmitry Mazuro
Ben Alpert
Marcin Kwiatkowski
petehunt