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Xuan Huang
dc8d218077
Summary: Changelog: [Internal] Historically, Immediate API is implemented upon the React Native's internal microtask-y queue (known as "immediate queue"), which is the same queue Promise polyfill is operating on. To make React Native suitable of using the built-in Promises from JSVMs, which usually enqueues to the JSVM internal microtask queue and has no access to React Native microtask-y queue, we need to migrate the Immediate API to use the JSVM microtask queue as well to preserve the semantics of code relies on the interleaving of promises and immediates. To do that, this diff implement a shim layer for immediate APIs via the new `global.queueMicrotask` API (which enqueues to JSVM) in JS, by wrapping the immediate callback into a "microtask callback", which validate the `immediate ID` against `clearedImmediate` Set before invoking it. Reviewed By: RSNara Differential Revision: D29845305 fbshipit-source-id: c2ed3fed426a5316b1e0dfbfaad51706d1765d4d