Add minimal support for process_utils on iOS

base/mac/mac_logging.cc

Index: base/mac/mac_logging.cc
diff --git a/base/mac/mac_logging.cc b/base/mac/mac_logging.cc
index 353f092150a94dd0d097f332f051fdfae5f60cb0..d58220fe8977a5bd03f5ec451d23affdbe089a1d 100644
--- a/base/mac/mac_logging.cc
+++ b/base/mac/mac_logging.cc
@@ -4,10 +4,12 @@
 
 #include "base/mac/mac_logging.h"
 
-#include <CoreServices/CoreServices.h>
-
 #include <iomanip>
 
+#if !defined(OS_IOS)
+#include <CoreServices/CoreServices.h>
+#endif
+
 namespace logging {
 
 OSStatusLogMessage::OSStatusLogMessage(const char* file_path,
@@ -19,11 +21,17 @@ OSStatusLogMessage::OSStatusLogMessage(const char* file_path,
 }
 
 OSStatusLogMessage::~OSStatusLogMessage() {
+#if defined(OS_IOS)
+  // TODO(ios): Consider using NSError with NSOSStatusErrorDomain to try to
+  // get a description of the failure.
+  stream() << ": " << status_;
+#else
   stream() << ": "
            << GetMacOSStatusErrorString(status_)
            << " ("
            << status_
            << ")";
+#endif
 }
 
 }  // namespace logging