Abrogate protos::internal::ExtensionIdentifier in favor of hpb::internal::ExtensionIdentifier

PiperOrigin-RevId: 670690046

hpb_generator/gen_extensions.cc

@@ -67,14 +67,14 @@ void WriteExtensionIdentifier(const protobuf::FieldDescriptor* ext,
   if (ext->extension_scope()) {
     output(
         R"cc(
-          const ::protos::internal::ExtensionIdentifier<$0, $3> $4::$2(&$1);
+          const hpb::internal::ExtensionIdentifier<$0, $3> $4::$2(&$1);
         )cc",
         ContainingTypeName(ext), mini_table_name, ext->name(),
         CppTypeParameterName(ext), ClassName(ext->extension_scope()));
   } else {
     output(
         R"cc(
-          const ::protos::internal::ExtensionIdentifier<$0, $3> $2(&$1);
+          const hpb::internal::ExtensionIdentifier<$0, $3> $2(&$1);
         )cc",
         ContainingTypeName(ext), mini_table_name, ext->name(),
         CppTypeParameterName(ext));

protos/protos.h

@@ -9,7 +9,6 @@
 #include "google/protobuf/hpb/hpb.h"
 namespace protos {
 namespace internal {
-using hpb::internal::ExtensionIdentifier;
 using hpb::internal::GetInternalMsg;
 using hpb::internal::PrivateAccess;
 using hpb::internal::Serialize;