Export of internal Abseil changes.

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cae9f0c87632d690ec3f471e181be247fe4fb025 by Abseil Team <absl-team@google.com>:

Run IWYU on some headers.

PiperOrigin-RevId: 248749194

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f57dcac97cacbe31769a8646020a99b6686987dc by Samuel Benzaquen <sbenza@google.com>:

Accept vector<bool>::reference in StrFormat and friends.

The proxy types might overload `operator&`. Use std::addressof instead.

PiperOrigin-RevId: 248619661
GitOrigin-RevId: cae9f0c87632d690ec3f471e181be247fe4fb025
Change-Id: Iacf5d46a59d1d5f1fa1fd4a1e0d0de8c6cbedb3e

absl/base/call_once.h

@@ -29,6 +29,7 @@
 #include <atomic>
 #include <cstdint>
 #include <type_traits>
+#include <utility>
 
 #include "absl/base/internal/invoke.h"
 #include "absl/base/internal/low_level_scheduling.h"
@@ -36,6 +37,7 @@
 #include "absl/base/internal/scheduling_mode.h"
 #include "absl/base/internal/spinlock_wait.h"
 #include "absl/base/macros.h"
+#include "absl/base/optimization.h"
 #include "absl/base/port.h"
 
 namespace absl {

absl/base/casts.h

@@ -27,6 +27,7 @@
 #include <cstring>
 #include <memory>
 #include <type_traits>
+#include <utility>
 
 #include "absl/base/internal/identity.h"
 #include "absl/base/macros.h"

absl/base/internal/low_level_alloc.h

@@ -25,6 +25,7 @@
 // IWYU pragma: private, include "base/low_level_alloc.h"
 
 #include <sys/types.h>
+
 #include <cstdint>
 
 #include "absl/base/attributes.h"

absl/base/internal/spinlock.h

@@ -32,6 +32,7 @@
 
 #include <stdint.h>
 #include <sys/types.h>
+
 #include <atomic>
 
 #include "absl/base/attributes.h"

absl/base/macros.h

@@ -31,6 +31,7 @@
 #include <cassert>
 #include <cstddef>
 
+#include "absl/base/optimization.h"
 #include "absl/base/port.h"
 
 // ABSL_ARRAYSIZE()