Migrate remaining odd callers of base::PostTask/Create*TaskRunner in /docs

Most callers were already migrated via scripts, this is a split
of the remaining callers or comment-references that weren't caught
by those scripts.

@QA: This CL is a logical no-op.

This CL was uploaded by git cl split.

[email protected]

Bug: 1026641
Change-Id: Ie08915968b50da8c04cc9b206cc6a2beaec11901
AX-Relnotes: n/a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3531170
Auto-Submit: Gabriel Charette <[email protected]>
Reviewed-by: Erik Staab <[email protected]>
Commit-Queue: Erik Staab <[email protected]>
Cr-Commit-Position: refs/heads/main@{#981891}
diff --git a/docs/threading_and_tasks_faq.md b/docs/threading_and_tasks_faq.md
index e534361..de618f4 100644
--- a/docs/threading_and_tasks_faq.md
+++ b/docs/threading_and_tasks_faq.md
@@ -190,7 +190,7 @@
 int g_condition = false;
 
 base::RunLoop run_loop;
-base::PostTask(FROM_HERE, {}, base::BindOnce(
+base::ThreadPool::PostTask(FROM_HERE, {}, base::BindOnce(
     [] (base::OnceClosure closure) {
         g_condition = true;
         std::move(quit_closure).Run();