Adds the missing WithRepeatedFieldSize method for protobuf domain customization.

PiperOrigin-RevId: 513623869

fuzztest/internal/protobuf_domain.h

diff --git a/fuzztest/internal/protobuf_domain.h b/fuzztest/internal/protobuf_domain.h
index b8d85c9..3bfb2ac 100644
--- a/fuzztest/internal/protobuf_domain.h
+++ b/fuzztest/internal/protobuf_domain.h
@@ -1513,6 +1513,19 @@
     return std::move(*this);
   }
 
+  ProtobufDomainImpl&& WithRepeatedFieldsSize(int64_t size) && {
+    WithRepeatedFieldsMinSize(size);
+    WithRepeatedFieldsMaxSize(size);
+    return std::move(*this);
+  }
+
+  ProtobufDomainImpl&& WithRepeatedFieldsSize(
+      std::function<bool(const FieldDescriptor*)> filter, int64_t size) && {
+    WithRepeatedFieldsMinSize(filter, size);
+    WithRepeatedFieldsMaxSize(filter, size);
+    return std::move(*this);
+  }
+
   ProtobufDomainImpl&& WithRepeatedFieldsMinSize(int64_t min_size) && {
     inner_.GetPolicy().SetMinRepeatedFieldsSize(IncludeAll<FieldDescriptor>(),
                                                 min_size);