Remove smart pointers from global registry

src/core/ext/filters/client_channel/service_config.cc

@@ -34,7 +34,7 @@
 namespace grpc_core {
 
 int ServiceConfig::registered_parsers_count = 0;
-UniquePtr<ServiceConfigParser>
+ServiceConfigParser
     ServiceConfig::registered_parsers[ServiceConfigParser::kMaxParsers];
 
 RefCountedPtr<ServiceConfig> ServiceConfig::Create(const char* json) {
@@ -85,7 +85,7 @@ void ServiceConfig::ParseGlobalParams(const grpc_json* json_tree,
   GPR_DEBUG_ASSERT(json_tree_->key == nullptr);
   for (auto i = 0; i < registered_parsers_count; i++) {
     auto parsed_obj =
-        registered_parsers[i]->ParseGlobalParams(json_tree, success);
+        registered_parsers[i].ParseGlobalParams(json_tree, success);
     if (!*success) {
       return;
     }
@@ -102,7 +102,7 @@ bool ServiceConfig::ParseJsonMethodConfigToServiceConfigObjectsTable(
   for (auto i = 0; i < registered_parsers_count; i++) {
     bool success;
     auto parsed_obj =
-        registered_parsers[i]->ParsePerMethodParams(json, &success);
+        registered_parsers[i].ParsePerMethodParams(json, &success);
     if (!success) {
       return false;
     }

src/core/ext/filters/client_channel/service_config.h

@@ -176,17 +176,12 @@ class ServiceConfig : public RefCounted<ServiceConfig> {
   /// registered parser. Each parser is responsible for reading the service
   /// config json and returning a parsed object. This parsed object can later be
   /// retrieved using the same index that was returned at registration time.
-  static int RegisterParser(UniquePtr<ServiceConfigParser> func) {
-    registered_parsers[registered_parsers_count] = std::move(func);
+  static int RegisterParser(const ServiceConfigParser& parser) {
+    registered_parsers[registered_parsers_count] = parser;
     return registered_parsers_count++;
   }
 
-  static void ResetServiceConfigParsers() {
-    for (auto i = 0; i < ServiceConfigParser::kMaxParsers; i++) {
-      registered_parsers[i].reset(nullptr);
-    }
-    registered_parsers_count = 0;
-  }
+  static void ResetServiceConfigParsers() { registered_parsers_count = 0; }
 
  private:
   // So New() can call our private ctor.
@@ -222,7 +217,7 @@ class ServiceConfig : public RefCounted<ServiceConfig> {
       size_t* idx);
 
   static int registered_parsers_count;
-  static UniquePtr<ServiceConfigParser>
+  static ServiceConfigParser
       registered_parsers[ServiceConfigParser::kMaxParsers];
 
   UniquePtr<char> service_config_json_;