GitLab

Moves the parallel module caching implementation for Windows into
ModuleCache. This implementation will be merged with the existing module
caching implementation over the course of later refactoring CLs.

Bug: 931418
Change-Id: I65309bca1edc2675e7e5d74e0305bf5cfe017fd1
Reviewed-on: https://chromium-review.googlesource.com/c/1478035
Commit-Queue: Mike Wittman <wittman@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Charlie Andrews <charliea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#634493}