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dd209bb789
Summary: Fixes #21086. Fixes #6117. This PR fixes a crash caused by a race condition when `webSocket` deallocated and `NSStream` delegate callback, because `NSStream`'s delegate callback be called on `RCTSR_networkRunLoop`. This PR mainly changes: * Remove unnecessary `nil` operation in `dealloc` method. * Add a new method `_scheduleCleanUp` to schedule `webSocket` cleanup also on `RCTSR_networkRunLoop`. * In `stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode` delegate method, add a `wself` to make safe further. Pull Request resolved: https://github.com/facebook/react-native/pull/22439 Differential Revision: D13564247 Pulled By: cpojer fbshipit-source-id: 675c1b2805aa45c54d7708d796f5843ef7ea34e2