Add missing #includes

PiperOrigin-RevId: 970246580
Change-Id: I9c52cf54c307cd789faf75db81d1a37b29814a30

absl/random/internal/pcg_engine.h

diff --git a/absl/random/internal/pcg_engine.h b/absl/random/internal/pcg_engine.h
index 96295b0..f85a1ac 100644
--- a/absl/random/internal/pcg_engine.h
+++ b/absl/random/internal/pcg_engine.h
@@ -15,6 +15,12 @@
 #ifndef ABSL_RANDOM_INTERNAL_PCG_ENGINE_H_
 #define ABSL_RANDOM_INTERNAL_PCG_ENGINE_H_
 
+#include <cstddef>
+#include <cstdint>
+#include <ios>
+#include <istream>
+#include <limits>
+#include <ostream>
 #include <type_traits>
 
 #include "absl/base/config.h"

absl/random/internal/randen_engine.h

diff --git a/absl/random/internal/randen_engine.h b/absl/random/internal/randen_engine.h
index 525d40a..a33736e 100644
--- a/absl/random/internal/randen_engine.h
+++ b/absl/random/internal/randen_engine.h
@@ -17,7 +17,9 @@
 
 #include <algorithm>
 #include <cinttypes>
+#include <cstdint>
 #include <cstdlib>
+#include <cstring>
 #include <istream>
 #include <iterator>
 #include <limits>

absl/random/internal/sequence_urbg.h

diff --git a/absl/random/internal/sequence_urbg.h b/absl/random/internal/sequence_urbg.h
index bc96a12..a7acd9e 100644
--- a/absl/random/internal/sequence_urbg.h
+++ b/absl/random/internal/sequence_urbg.h
@@ -17,6 +17,7 @@
 
 #include <cstdint>
 #include <cstring>
+#include <initializer_list>
 #include <limits>
 #include <type_traits>
 #include <vector>

absl/random/internal/traits.h

diff --git a/absl/random/internal/traits.h b/absl/random/internal/traits.h
index 8bde0ce..8404d93 100644
--- a/absl/random/internal/traits.h
+++ b/absl/random/internal/traits.h
@@ -15,6 +15,7 @@
 #ifndef ABSL_RANDOM_INTERNAL_TRAITS_H_
 #define ABSL_RANDOM_INTERNAL_TRAITS_H_
 
+#include <cstddef>
 #include <cstdint>
 #include <limits>
 #include <type_traits>

absl/random/internal/wide_multiply.h

diff --git a/absl/random/internal/wide_multiply.h b/absl/random/internal/wide_multiply.h
index 736e897..9cf17a9 100644
--- a/absl/random/internal/wide_multiply.h
+++ b/absl/random/internal/wide_multiply.h
@@ -15,6 +15,7 @@
 #ifndef ABSL_RANDOM_INTERNAL_WIDE_MULTIPLY_H_
 #define ABSL_RANDOM_INTERNAL_WIDE_MULTIPLY_H_
 
+#include <cstddef>
 #include <cstdint>
 #include <limits>
 #include <type_traits>