Use a non-deprecated method to get a string from an OSStatus error .

base/mac/mac_logging.mm

Index: base/mac/mac_logging.mm
diff --git a/base/mac/mac_logging.cc b/base/mac/mac_logging.mm
similarity index 78%
rename from base/mac/mac_logging.cc
rename to base/mac/mac_logging.mm
index e82b0ed5f6c7cbf4e588725acba99bc73ea0a328..381ad30614ea2ae4fbab4b04e1c97224f427d435 100644
--- a/base/mac/mac_logging.cc
+++ b/base/mac/mac_logging.mm
@@ -3,16 +3,25 @@
 // found in the LICENSE file.
 
 #include "base/mac/mac_logging.h"
-#include "build/build_config.h"
+
+#import <Foundation/Foundation.h>
 
 #include <iomanip>
 
+#include "build/build_config.h"
+
 #if !defined(OS_IOS)
 #include <CoreServices/CoreServices.h>
 #endif
 
 namespace logging {
 
+std::string DescriptionFromOSStatus(OSStatus err) {
+  NSError* error =
+      [NSError errorWithDomain:NSOSStatusErrorDomain code:err userInfo:nil];
+  return error.description.UTF8String;

[Mark Mentovai, 2016/03/01 15:27:23]

Is the full -description what we want, or do we want -localizedDescription? How
does what this produces now compare to what we were getting before from
GetMacOSStatusErrorString()?

[erikchen, 2016/03/01 18:02:00]

We want -description.

-description: Error Domain=NSOSStatusErrorDomain Code=-42 tmfoErr: too many
files open
-localizedDescription: The operation couldn't be completed. (OSStatus error
-42.)
GetMacOSStatusErrorString: tmfoErr

+}
+
 OSStatusLogMessage::OSStatusLogMessage(const char* file_path,
                                        int line,
                                        LogSeverity severity,
@@ -28,7 +37,7 @@ OSStatusLogMessage::~OSStatusLogMessage() {
   stream() << ": " << status_;
 #else
   stream() << ": "
-           << GetMacOSStatusErrorString(status_)
+           << DescriptionFromOSStatus(status_)
            << " ("
            << status_
            << ")";