Moved ReactFiberClassComponent validateCallback() helper function into a standalone util used by both fiber and stack implementations. Validation now happens in ReactFiberUpdateQueue so that non-DOM renderers will also benefit from it.
Fixes an issue (in both Stack and Fiber) where enqueueSetState causes
a synchronous update that flushes before enqueueCallback is ever called.
Now enqueueSetState et al accept an optional callback so that both
are scheduled at the same time.
* create failing test case
* Fix renderSubtreeIntoContainer to update context
Fixes#6599
* Also test re-rendering due to prop update
* Address review feedback
This is an outline for the new reconciler infrastructure.
I created a noop renderer to have something to get started from.
I split the reconciler folder into old and new, as well as shared.
I put shouldUpdateReactComponent in shared as an example of a
utility that can easily be shared between both. I plan on breaking
out more utilities like these.
Brian Vaughn