Add minimal support for process_utils on iOS

base/mac/mac_logging.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/mac/mac_logging.h"
 
+#include <iomanip>
+
+#if !defined(OS_IOS)
 #include <CoreServices/CoreServices.h>
-
-#include <iomanip>
+#endif
 
 namespace logging {
 
 OSStatusLogMessage::OSStatusLogMessage(const char* file_path,
                                        int line,
                                        LogSeverity severity,
                                        OSStatus status)
     : LogMessage(file_path, line, severity),
       status_(status) {
 }
 
 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