Removed harmful optimization in ReactNativeEventEmitter

Reviewed By: spicyj

Differential Revision: D4729779

fbshipit-source-id: 2dd5ec10d42df7f24804796c4100eca107edeedb

Author: shergin

Libraries/Renderer/src/renderers/native/ReactNativeEventEmitter.js

@@ -103,11 +103,6 @@ var ReactNativeEventEmitter = {
   ) {
     var nativeEvent = nativeEventParam || EMPTY_NATIVE_EVENT;
     var inst = ReactNativeComponentTree.getInstanceFromNode(rootNodeID);
-    if (!inst) {
-      // If the original instance is already gone, we don't have to dispatch
-      // any events.
-      return;
-    }
     ReactGenericBatching.batchedUpdates(function() {
       ReactNativeEventEmitter.handleTopLevel(
         topLevelType,

Libraries/Renderer/src/renderers/shared/shared/event/EventPropagators.js

@@ -93,7 +93,7 @@ function accumulateTwoPhaseDispatchesSingleSkipTarget(event) {
  * requiring that the `dispatchMarker` be the same as the dispatched ID.
  */
 function accumulateDispatches(inst, ignoredDirection, event) {
-  if (event && event.dispatchConfig.registrationName) {
+  if (inst && event && event.dispatchConfig.registrationName) {
     var registrationName = event.dispatchConfig.registrationName;
     var listener = getListener(inst, registrationName);
     if (listener) {