Summary:
Changelog: [Internal]
This adds JS side implementation (including the API) for the `Performance.measure` functionality, [as described in the corresponding standard](https://www.w3.org/TR/user-timing/#measure-method).
The JS part is separated from the C++ implementation (further down the stack) to help the review being more focused.
Reviewed By: mdvacca
Differential Revision: D41733190
fbshipit-source-id: 72b69f6bb332aed4b9477a186b0e818b62009220