Roll abseil_revision 8f11724067..e9324d926a.

Change Log:
https://chromium.googlesource.com/external/github.com/abseil/abseil-cpp/+log/8f11724067..e9324d926a
Full diff:
https://chromium.googlesource.com/external/github.com/abseil/abseil-cpp/+/8f11724067..e9324d926a

Manual change:
Abseil is migrating to ABSL_ prefixed thread annotations, in order to
do so, a backwards compatible absl/base/internal/thread_annotations.h
has been created (with unprefixed thread annotations). This file is
excluded from this CL because unprefixed thread annotations are
problematic to Chromium and they were in fact prefixed by [1] during
every roll.

[1] - https://cs.chromium.org/chromium/src/third_party/abseil-cpp/rename_annotations.sh?l=130-165&rcl=0ec2bec15811f730af0ad00cb3a30b9bc86d821d

Bug: None
Change-Id: I47f3af2c9b40efbe0398617830dfe21aadc77a37
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1672069
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Mirko Bonadei <mbonadei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#671764}
127 files changed