Summary:
Discovered when debugging a React Native app in Chrome. The function `performanceNow` was recently changed, so that in Chrome it now refers to `performance.now()` method. However, `now()` cannot be called standalone without a context.
Reproduced by a synthetic example in Chrome:
```
const performanceNow = window.performance.now;
performanceNow();
Uncaught TypeError: Illegal invocation
at <anonymous>:1:1
```
Changelog:
[General] [Fixed] - Fix failure when debugging code in a browser; was caused by `performanceNow()` function.
Reviewed By: cpojer
Differential Revision: D22739176
fbshipit-source-id: f89b8a215b7b4c430ffd72a1d23539c4f1b31d24
Andrey Tserkus
db474a47b7