Allocator cleanup: allocator_extension call directly into tcmalloc
After crrev.com/1584893002 base/ can use directly allocator.
The grand plan is to dismantle all the indirection layer such that:
- base is the only thing that knows about allocator-specific details.
- non-base code uses only base abstractions and stops looking
at USE_TCMALLOC build flags.
This CL, specifically, addresses the profiling-related methods moving
the tcmalloc-specific dependencies to base and base only.
Other parts of the codebase will be cleaned up in separate CLs.
Also this CL removes a stale base/debug/OWNERS. That file makes
no sense these days as tracing has been moved to base/trace_event/.
BUG=564618
Review URL: https://codereview.chromium.org/1607303002
Cr-Commit-Position: refs/heads/master@{#371335}
9 files changed
