dillon1000/react

Implement event-specific pooling for SyntheticEvent (#10237)

* Remove PooledClass from FallbackCompositionState

The only module that uses FallbackCompositonState is BeforeInputEventPlugin. The way its structured means there can only be a single instance of FallbackCompositionState at any given time (stored in a local variable at the top-level) so we don't really need pooling here at all. Instead, a single object is now stored in FallbackCompositionState, and access (initializing, reseting, getting data) is gaurded by the exported helper object.

* Use new FallbackCompositionState API in BeforeInputEventPlugin

* Implement event-specific pooling in SyntheticEvent

* Remove PooledClass from TopLevelCallbackBookKeeping

* Update results.json

* Add pooled event test fixtures (#1)

* Fix fixture lint