gn: Remove Scheduler::pool().

InputFileManager used this accessor to post a BLOCK_SHUTDOWN task.
This can be replaced by a call to ScheduleWork(). In both cases,
Scheduler::Run() doesn't return before the task runs.

BUG=

Review-Url: https://codereview.chromium.org/2515383005
Cr-Original-Commit-Position: refs/heads/master@{#436362}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 5476ec6bf7ccbada1734a0cdec7d570bb042aa30
2 files changed
tree: 77426610dd85d9d1073ce46b7c08e6303133ee37
  1. tools/