We count the calls to `createTask` to track adoption.

Chromium CL: https://crrev.com/c/3894138

R=kimanh@chromium.org

Bug: chromium:1334585
Change-Id: I091f738e5b0dfdbb5843cda09eed7d3f906ea681
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3892783
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83199}