Rollback of fix "unsafe narrowing" warnings in absl, 8/n.

Addresses failures with the following, in some files:
-Wshorten-64-to-32
-Wimplicit-int-conversion
-Wsign-compare
-Wsign-conversion
-Wtautological-unsigned-zero-compare

(This specific CL focuses on .cc files in */internal/.)

Bug: chromium:1292951
PiperOrigin-RevId: 471561809
Change-Id: I7abd6d83706f5ca135f1ce3458192a498a6280b9

1 files changed, 2 insertions, 2 deletions

diff --git a/absl/random/internal/seed_material.cc b/absl/random/internal/seed_material.cc
index 1041302b..c03cad85 100644
--- a/absl/random/internal/seed_material.cc
+++ b/absl/random/internal/seed_material.cc
@@ -173,12 +173,12 @@ bool ReadSeedMaterialFromDevURandom(absl::Span<uint32_t> values) {
   }
 
   while (success && buffer_size > 0) {
-    ssize_t bytes_read = read(dev_urandom, buffer, buffer_size);
+    int bytes_read = read(dev_urandom, buffer, buffer_size);
     int read_error = errno;
     success = (bytes_read > 0);
     if (success) {
       buffer += bytes_read;
-      buffer_size -= static_cast<size_t>(bytes_read);
+      buffer_size -= bytes_read;
     } else if (bytes_read == -1 && read_error == EINTR) {
       success = true;  // Need to try again.
     }