GitLab

Moves InitializeDefaultDispatchToMacAllocator from
allocator_shim_default_dispatch_to_mac_zoned_malloc.{cc,h} to
allocator_interception_mac.{cc,h} so that it works with other
allocator shims.

The function is used to hook the standard allocation functions
and not used to install our own allocator shim.  So,
allocator_interception_mac.{cc,h} is a better place.

This patch makes PA-E on macOS compilable.

Bug: 998048
Change-Id: I03f3cecc0f79febd5aec6ef4fde9a72cc0787d37
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2400781Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Benoit L <lizeb@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805811}