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b548087c24ae7c2c709e8040a118b5e312d18e2e by Derek Mauro <dmauro@google.com>:

Remove the static initialization of global variables used by absl::Mutex
as requested by Chromium

PiperOrigin-RevId: 317676541

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f198f5da1e966772efa978ba019bd23576899794 by Greg Miller <jgm@google.com>:

fix: work around gcc-4.8 bug in disjunction

See https://godbolt.org/z/i7-AmM for a repro of the bug.

I realize that Abseil no longer supports gcc 4.8 officially
(https://abseil.io/docs/cpp/platforms/platforms), but Cloud C++ still supports
gcc 4.8 officially, and so it would be nice to get this simple fix in.

fixes https://github.com/abseil/abseil-cpp/issues/718

PiperOrigin-RevId: 317484459

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ed233f646530c6c0948213b643cc6919db1bee90 by Chris Kennelly <ckennelly@google.com>:

Avoid determining the size of the duration unit at runtime.

PiperOrigin-RevId: 317376300

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73d4011c17fcf747a990176924a7adc69d443533 by Greg Falcon <gfalcon@google.com>:

Change spelling of internal detail from `Invoke`/`InvokeT` to `invoke`/`invoke_result_t`.

This matches the spelling of the C++17 standard library names that perform the same operations.

PiperOrigin-RevId: 317311527
GitOrigin-RevId: b548087c24ae7c2c709e8040a118b5e312d18e2e
Change-Id: I131809ff0b92cfdb0d96dc94e94d9c6f751cb0ac