Migrate remaining well known type handling and remove deadcode

PiperOrigin-RevId: 689126721

Author: jcking

common/BUILD

@@ -652,7 +652,6 @@ cc_library(
         "//extensions/protobuf:memory_manager",
         "//extensions/protobuf/internal:map_reflection",
         "//extensions/protobuf/internal:qualify",
-        "//extensions/protobuf/internal:struct_lite",
         "//internal:casts",
         "//internal:deserialize",
         "//internal:json",

common/legacy_value.cc

@@ -58,8 +58,8 @@
 #include "eval/public/structs/legacy_type_adapter.h"
 #include "eval/public/structs/legacy_type_info_apis.h"
 #include "eval/public/structs/proto_message_type_adapter.h"
-#include "extensions/protobuf/internal/struct_lite.h"
 #include "extensions/protobuf/memory_manager.h"
+#include "internal/json.h"
 #include "internal/status_macros.h"
 #include "internal/time.h"
 #include "internal/well_known_types.h"
@@ -268,9 +268,7 @@ absl::Status cel_common_internal_LegacyListValue_SerializeTo(
   google::protobuf::ListValue message;
   google::protobuf::Arena arena;
   CEL_ASSIGN_OR_RETURN(auto array, CelListToJsonArray(&arena, AsCelList(impl)));
-  CEL_RETURN_IF_ERROR(
-      extensions::protobuf_internal::GeneratedListValueProtoFromJson(array,
-                                                                     message));
+  CEL_RETURN_IF_ERROR(internal::NativeJsonListToProtoJsonList(array, &message));
   if (!message.SerializePartialToCord(&serialized_value)) {
     return absl::UnknownError("failed to serialize google.protobuf.ListValue");
   }
@@ -559,9 +557,7 @@ absl::Status cel_common_internal_LegacyMapValue_SerializeTo(
   google::protobuf::Struct message;
   google::protobuf::Arena arena;
   CEL_ASSIGN_OR_RETURN(auto object, CelMapToJsonObject(&arena, AsCelMap(impl)));
-  CEL_RETURN_IF_ERROR(
-      extensions::protobuf_internal::GeneratedStructProtoFromJson(object,
-                                                                  message));
+  CEL_RETURN_IF_ERROR(internal::NativeJsonMapToProtoJsonMap(object, &message));
   if (!message.SerializePartialToCord(&serialized_value)) {
     return absl::UnknownError("failed to serialize google.protobuf.Struct");
   }

eval/public/structs/BUILD

@@ -56,25 +56,25 @@ cc_library(
     ],
     deps = [
         ":protobuf_value_factory",
-        "//common:any",
         "//eval/public:cel_value",
         "//eval/testutil:test_message_cc_proto",
-        "//extensions/protobuf/internal:any",
-        "//extensions/protobuf/internal:duration",
-        "//extensions/protobuf/internal:struct",
-        "//extensions/protobuf/internal:timestamp",
-        "//extensions/protobuf/internal:wrappers",
         "//internal:overflow",
         "//internal:proto_time_encoding",
+        "//internal:status_macros",
         "//internal:time",
+        "//internal:well_known_types",
         "@com_google_absl//absl/base:core_headers",
-        "@com_google_absl//absl/container:flat_hash_map",
+        "@com_google_absl//absl/base:nullability",
+        "@com_google_absl//absl/functional:overload",
+        "@com_google_absl//absl/log:absl_check",
         "@com_google_absl//absl/status",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/strings:cord",
         "@com_google_absl//absl/synchronization",
         "@com_google_absl//absl/time",
         "@com_google_absl//absl/types:optional",
+        "@com_google_absl//absl/types:variant",
         "@com_google_protobuf//:protobuf",
     ],
 )