Called when an uninterruptible reflow has occurred.
| start | timestamp when reflow ended, in milliseconds since navigationStart (accurate to 1/1000 of a ms) |
| end | timestamp when reflow ended, in milliseconds since navigationStart (accurate to 1/1000 of a ms) |
Called when an interruptible reflow has occurred.
| start | timestamp when reflow ended, in milliseconds since navigationStart (accurate to 1/1000 of a ms) |
| end | timestamp when reflow ended, in milliseconds since navigationStart (accurate to 1/1000 of a ms) |