Another round of cleanups for http://www.dartbug.com/15922

runtime/bin/process_macos.cc

 // Copyright (c) 2012, 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/process.h"
 
 #include <errno.h>  // NOLINT
@@ skipping 726 matching lines @@
     handler = handler->next();
   }
   if (listen) {
     struct sigaction act;
     bzero(&act, sizeof(act));
     act.sa_handler = SignalHandler;
     sigemptyset(&act.sa_mask);
     for (int i = 0; i < kSignalsCount; i++) {
       sigaddset(&act.sa_mask, kSignals[i]);
     }
-    int status = TEMP_FAILURE_RETRY_BLOCK_SIGNALS(
+    intptr_t status = TEMP_FAILURE_RETRY_BLOCK_SIGNALS(
         sigaction(signal, &act, NULL));
     if (status < 0) {
       VOID_TEMP_FAILURE_RETRY_BLOCK_SIGNALS(close(fds[0]));
       VOID_TEMP_FAILURE_RETRY_BLOCK_SIGNALS(close(fds[1]));
       return -1;
     }
   }
   if (signal_handlers == NULL) {
     signal_handlers = new SignalInfo(fds[1], signal);
   } else {
@@ skipping 30 matching lines @@
     bzero(&act, sizeof(act));
     act.sa_handler = SIG_DFL;
     VOID_TEMP_FAILURE_RETRY_BLOCK_SIGNALS(sigaction(signal, &act, NULL));
   }
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)