Try to fix Mac build

runtime/bin/secure_socket_macos.cc

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_MACOS)
 
 #include "bin/secure_socket.h"
 #include "bin/secure_socket_macos.h"
 
@@ skipping 1029 matching lines @@
   }
 
   CFRelease(cert_dict);
   CFRelease(key_array);
   return issuer_name;
 }
 
 
 void FUNCTION_NAME(X509_Subject)(Dart_NativeArguments args) {
   SecCertificateRef certificate = GetX509Certificate(args);
-  char* subject_name = GetNameFromCert(certificate,
-                                       kSecOIDX509V1SubjectName,
-                                       kSecOIDCommonName);
+  char* subject_name = GetNameFromCert(
+      certificate,
+      kSecOIDX509V1SubjectName,
+      reinterpret_cast<CFStringRef>(kSecOIDCommonName));
   if (subject_name == NULL) {
     Dart_ThrowException(DartUtils::NewDartArgumentError(
         "X509.subject failed to find issuer's common name."));
   } else {
     Dart_SetReturnValue(args, Dart_NewStringFromCString(subject_name));
   }
 }
 
 
 void FUNCTION_NAME(X509_Issuer)(Dart_NativeArguments args) {
   SecCertificateRef certificate = GetX509Certificate(args);
-  char* issuer_name = GetNameFromCert(certificate,
-                                      kSecOIDX509V1IssuerName,
-                                      kSecOIDCommonName);
+  char* issuer_name = GetNameFromCert(
+      certificate,
+      kSecOIDX509V1IssuerName,
+      reinterpret_cast<CFStringRef>(kSecOIDCommonName));
   if (issuer_name == NULL) {
     Dart_ThrowException(DartUtils::NewDartArgumentError(
         "X509.issuer failed to find issuer's common name."));
   } else {
     Dart_SetReturnValue(args, Dart_NewStringFromCString(issuer_name));
   }
 }
 
 
 // Returns the number of seconds since the epoch from 'field'.
@@ skipping 988 matching lines @@
     }
   }
   *bytes_processed = static_cast<intptr_t>(bytes);
   return status;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)