In case you have no access to your Google Pixel's own charger, you can still charge the phone quickly using a third party option like the Ventev Wallport pd1300 Wall Charger over USB Power Delivery.
Here we use the Ventev Wallport pd1300 Wall Charger to start charging the Google Pixel from a fully depleted battery. The Ventev charger is seen to repeatedly display its USB Power Delivery profiles of 15 watts (5 volts @ 3 amps), 27 watts (9 volts @ 3 amps), 45 watts (15 volts @ 3 amps), and 45 watts (20 volts @ 2.25 amps).
After several hard resets, the Google Pixel finally requests to pull 15 watts (5 volts @ 3 amps) which is accepted by the charger.
We can confirm that the Google Pixel is pulling about 15 watts (5 volts @ 3 amps) from the Ventev Wallport pd1300 Wall Charger while the phone's battery is fully drained.