[base] Cleanup remaining mentions of post_task.h

Bug: 1026641
Change-Id: I2bbd0822ad045651d10bd66ce81fe0fb99ff3de2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3565099
Reviewed-by: Avi Drissman <[email protected]>
Reviewed-by: Rohit Rao <[email protected]>
Reviewed-by: Ken Rockot <[email protected]>
Reviewed-by: Francois Pierre Doray <[email protected]>
Commit-Queue: Francois Pierre Doray <[email protected]>
Owners-Override: Francois Pierre Doray <[email protected]>
Cr-Commit-Position: refs/heads/main@{#988170}
diff --git a/docs/threading_and_tasks_testing.md b/docs/threading_and_tasks_testing.md
index ab084fa..d66722ff 100644
--- a/docs/threading_and_tasks_testing.md
+++ b/docs/threading_and_tasks_testing.md
@@ -95,7 +95,7 @@
 not but you shouldn't be afraid to lift it.
 
 Task runners are still obtained by the product code through
-[base/task/post_task.h] without necessitating a test-only task runner injection
+[base/task/thread_pool.h] without necessitating a test-only task runner injection
 seam :).
 
 Typical use case:
@@ -461,7 +461,7 @@
 [Threading and Tasks FAQ]: threading_and_tasks_faq.md
 [`ValidTraits`]: https://cs.chromium.org/chromium/src/base/test/task_environment.h?type=cs&q=ValidTraits&sq=package:chromium&g=0
 [task_environment.h]: https://cs.chromium.org/chromium/src/base/test/task_environment.h
-[base/task/post_task.h]: https://cs.chromium.org/chromium/src/base/task/post_task.h
+[base/task/thread_pool.h]: https://cs.chromium.org/chromium/src/base/task/thread_pool.h
 [ViewsTestBase]: https://cs.chromium.org/chromium/src/ui/views/test/views_test_base.h
 [base/traits_bag.h]: https://cs.chromium.org/chromium/src/base/traits_bag.h
 [content/public/test/browser_test_utils.h]: https://cs.chromium.org/chromium/src/content/public/test/browser_test_utils.h