Landing patch set 7 from https://codereview.chromium.org/1450113003/

runtime/bin/process_macos.cc

Index: runtime/bin/process_macos.cc
diff --git a/runtime/bin/process_macos.cc b/runtime/bin/process_macos.cc
index f6949582e229ea5012979376a11e8ee4339349c4..1ce34f99149e5b17fec74d18f278cfee655defd0 100644
--- a/runtime/bin/process_macos.cc
+++ b/runtime/bin/process_macos.cc
@@ -25,6 +25,7 @@
 #include "bin/thread.h"
 
 #include "platform/signal_blocker.h"
+#include "platform/utils.h"
 
 
 
@@ -660,7 +661,7 @@ class ProcessStarter {
   void SetChildOsErrorMessage() {
     const int kBufferSize = 1024;
     char error_message[kBufferSize];
-    strerror_r(errno, error_message, kBufferSize);
+    Utils::StrError(errno, error_message, kBufferSize);
     *os_error_message_ = strdup(error_message);
   }
 
@@ -671,7 +672,7 @@ class ProcessStarter {
     int child_errno = errno;
     const int kBufferSize = 1024;
     char os_error_message[kBufferSize];
-    strerror_r(errno, os_error_message, kBufferSize);
+    Utils::StrError(errno, os_error_message, kBufferSize);
     int bytes_written =
         FDUtils::WriteToBlocking(
             exec_control_[1], &child_errno, sizeof(child_errno));