Added static Type method to some credential types

* grpc_google_default_channel_credentials
* TlsServerCredentials
* grpc_alts(_server)_credentials
* UrlExternalAccountCredentials
* FileExternalAccountCredentials
* AwsExternalAccountCredentials

src/core/lib/security/credentials/alts/alts_credentials.cc

@@ -54,7 +54,7 @@ grpc_alts_credentials::create_security_connector(
       this->Ref(), std::move(call_creds), target_name);
 }
 
-grpc_core::UniqueTypeName grpc_alts_credentials::type() const {
+grpc_core::UniqueTypeName grpc_alts_credentials::Type() {
   static grpc_core::UniqueTypeName::Factory kFactory("Alts");
   return kFactory.Create();
 }
@@ -80,7 +80,7 @@ grpc_alts_server_credentials::~grpc_alts_server_credentials() {
   gpr_free(handshaker_service_url_);
 }
 
-grpc_core::UniqueTypeName grpc_alts_server_credentials::type() const {
+grpc_core::UniqueTypeName grpc_alts_server_credentials::Type() {
   static grpc_core::UniqueTypeName::Factory kFactory("Alts");
   return kFactory.Create();
 }

src/core/lib/security/credentials/alts/alts_credentials.h

@@ -43,7 +43,9 @@ class grpc_alts_credentials final : public grpc_channel_credentials {
       grpc_core::RefCountedPtr<grpc_call_credentials> call_creds,
       const char* target_name, grpc_core::ChannelArgs* args) override;
 
-  grpc_core::UniqueTypeName type() const override;
+  static grpc_core::UniqueTypeName Type();
+
+  grpc_core::UniqueTypeName type() const override { return Type(); }
 
   const grpc_alts_credentials_options* options() const { return options_; }
   grpc_alts_credentials_options* mutable_options() { return options_; }
@@ -70,7 +72,9 @@ class grpc_alts_server_credentials final : public grpc_server_credentials {
   grpc_core::RefCountedPtr<grpc_server_security_connector>
   create_security_connector(const grpc_core::ChannelArgs& /* args */) override;
 
-  grpc_core::UniqueTypeName type() const override;
+  static grpc_core::UniqueTypeName Type();
+
+  grpc_core::UniqueTypeName type() const override { return Type(); }
 
   const grpc_alts_credentials_options* options() const { return options_; }
   grpc_alts_credentials_options* mutable_options() { return options_; }

src/core/lib/security/credentials/external/aws_external_account_credentials.cc

@@ -512,7 +512,7 @@ std::string AwsExternalAccountCredentials::debug_string() {
                       ")");
 }
 
-UniqueTypeName AwsExternalAccountCredentials::type() const {
+UniqueTypeName AwsExternalAccountCredentials::Type() {
   static UniqueTypeName::Factory kFactory("AwsExternalAccountCredentials");
   return kFactory.Create();
 }

src/core/lib/security/credentials/external/aws_external_account_credentials.h

@@ -51,7 +51,9 @@ class AwsExternalAccountCredentials final : public ExternalAccountCredentials {
 
   std::string debug_string() override;
 
-  UniqueTypeName type() const override;
+  static UniqueTypeName Type();
+
+  UniqueTypeName type() const override { return Type(); }
 
  private:
   // A FetchBody impl that itself performs a sequence of FetchBody operations.

src/core/lib/security/credentials/external/file_external_account_credentials.cc

@@ -157,7 +157,7 @@ std::string FileExternalAccountCredentials::debug_string() {
                       ")");
 }
 
-UniqueTypeName FileExternalAccountCredentials::type() const {
+UniqueTypeName FileExternalAccountCredentials::Type() {
   static UniqueTypeName::Factory kFactory("FileExternalAccountCredentials");
   return kFactory.Create();
 }

src/core/lib/security/credentials/external/file_external_account_credentials.h

@@ -46,7 +46,9 @@ class FileExternalAccountCredentials final : public ExternalAccountCredentials {
 
   std::string debug_string() override;
 
-  UniqueTypeName type() const override;
+  static UniqueTypeName Type();
+
+  UniqueTypeName type() const override { return Type(); }
 
  private:
   class FileFetchBody final : public FetchBody {

src/core/lib/security/credentials/external/url_external_account_credentials.cc

@@ -137,7 +137,7 @@ std::string UrlExternalAccountCredentials::debug_string() {
                       ")");
 }
 
-UniqueTypeName UrlExternalAccountCredentials::type() const {
+UniqueTypeName UrlExternalAccountCredentials::Type() {
   static UniqueTypeName::Factory kFactory("UrlExternalAccountCredentials");
   return kFactory.Create();
 }

src/core/lib/security/credentials/external/url_external_account_credentials.h

@@ -50,7 +50,9 @@ class UrlExternalAccountCredentials final : public ExternalAccountCredentials {
 
   std::string debug_string() override;
 
-  UniqueTypeName type() const override;
+  static UniqueTypeName Type();
+
+  UniqueTypeName type() const override { return Type(); }
 
  private:
   OrphanablePtr<FetchBody> RetrieveSubjectToken(

src/core/lib/security/credentials/google_default/google_default_credentials.cc

@@ -162,8 +162,7 @@ grpc_google_default_channel_credentials::update_arguments(
   return args.SetIfUnset(GRPC_ARG_DNS_ENABLE_SRV_QUERIES, true);
 }
 
-grpc_core::UniqueTypeName grpc_google_default_channel_credentials::type()
+grpc_core::UniqueTypeName grpc_google_default_channel_credentials::Type() {
-    const {
   static grpc_core::UniqueTypeName::Factory kFactory("GoogleDefault");
   return kFactory.Create();
 }

src/core/lib/security/credentials/google_default/google_default_credentials.h

@@ -65,7 +65,9 @@ class grpc_google_default_channel_credentials
 
   grpc_core::ChannelArgs update_arguments(grpc_core::ChannelArgs args) override;
 
-  grpc_core::UniqueTypeName type() const override;
+  static grpc_core::UniqueTypeName Type();
+
+  grpc_core::UniqueTypeName type() const override { return Type(); }
 
   const grpc_channel_credentials* alts_creds() const {
     return alts_creds_.get();

src/core/lib/security/credentials/tls/tls_credentials.cc

@@ -145,7 +145,7 @@ TlsServerCredentials::create_security_connector(
       CreateTlsServerSecurityConnector(this->Ref(), options_);
 }
 
-grpc_core::UniqueTypeName TlsServerCredentials::type() const {
+grpc_core::UniqueTypeName TlsServerCredentials::Type() {
   static grpc_core::UniqueTypeName::Factory kFactory("Tls");
   return kFactory.Create();
 }

src/core/lib/security/credentials/tls/tls_credentials.h

@@ -62,7 +62,9 @@ class TlsServerCredentials final : public grpc_server_credentials {
   grpc_core::RefCountedPtr<grpc_server_security_connector>
   create_security_connector(const grpc_core::ChannelArgs& /* args */) override;
 
-  grpc_core::UniqueTypeName type() const override;
+  static grpc_core::UniqueTypeName Type();
+
+  grpc_core::UniqueTypeName type() const override { return Type(); }
 
   grpc_tls_credentials_options* options() const { return options_.get(); }