KaiOS device plugin for recording memory allocations

Summary:
This adds basic plugin for recording memory allocations.
{F224005997}

Reviewed By: passy

Differential Revision: D18837209

fbshipit-source-id: aa29680b3a44c51135b760fe4ee76edc6d0ec109

src/utils/promiseTimeout.tsx

@@ -15,17 +15,23 @@ export default function promiseTimeout<T>(
   timeoutMessage?: string,
 ): Promise<T> {
   // Create a promise that rejects in <ms> milliseconds
-  const timeout: Promise<T> = new Promise((resolve, reject) => {
-    const id = setTimeout(() => {
-      clearTimeout(id);
-      reject(new Error(timeoutMessage || `Timed out in ${ms} ms.`));
-    }, ms);
+  const timeout = sleep(ms).then(() => {
+    throw new Error(timeoutMessage || `Timed out in ${ms} ms.`);
   });
 
   // Returns a race between our timeout and the passed in promise
   return Promise.race([promise, timeout]);
 }
 
+export function sleep(ms: number): Promise<void> {
+  return new Promise(resolve => {
+    const id = setTimeout(() => {
+      clearTimeout(id);
+      resolve();
+    }, ms);
+  });
+}
+
 export function showStatusUpdatesForPromise<T>(
   promise: Promise<T>,
   message: string,