Reland "[base] Populate crash keys in TaskQueueImpl::RemoveCancelledTasks."

This is a reland of commit ca96936f65fea93f992ca9b9e3242fb0198382e2

Change since initial patch: Shorter key names, to fit in
the limits enforced here
https://source.chromium.org/chromium/chromium/src/+/main:base/debug/crash_logging.cc;l=33-38;drc=91dee85dd1c0247c1bd3462ecd5d96fce916e28c
Diff:
https://chromium-review.googlesource.com/c/chromium/src/+/6479372/2..3/base/task/sequence_manager/task_queue_impl.cc

Original change's description:
> [base] Populate crash keys in TaskQueueImpl::RemoveCancelledTasks.
>
> Today, TaskQueueImpl::RemoveCancelledTasks is only called by
> blink::ScriptedIdleTaskController, when it knows that there are at
> least 1000 canceled tasks in the queue (in other words, it's called
> infrequently). Unfortunately, a check in
> blink::ScriptedIdleTaskController reveals that there are sometimes less
> tasks than expected which get cleaned up. This CL adds temporary crash
> keys in TaskQueueImpl::RemoveCancelledTasks to verify whether
> blink::ScriptedIdleTaskController's accounting of the number of tasks
> in the idle queue is accurate (depending on the answer, we'll focus
> on finding issues with the accounting or finding issues in the
> clean up logic).
>
> Bug: 394266102
> Change-Id: Ic9343887feead39b1feb839a6e6db0330024d4a6
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6357373
> Auto-Submit: Francois Pierre Doray <fdoray@chromium.org>
> Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
> Reviewed-by: Etienne Pierre-Doray <etiennep@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1447129}

Bug: 394266102
Change-Id: I43849ede482df93f62997ff41b47e7a0e4c0cb16
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6479372
Auto-Submit: Francois Pierre Doray <fdoray@chromium.org>
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Reviewed-by: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1450498}