Replace use of GetMacOSStatusErrorString (deprecated) with use of NSOSStatusErrorDomain.

webrtc/base/logging_mac.mm

 /*
- *  Copyright 2008 The WebRTC Project Authors. All rights reserved.
+ *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include "webrtc/base/logging.h"
+
 #import <Foundation/Foundation.h>
 
-#import "webrtc/base/scoped_autorelease_pool.h"
 
 namespace rtc {
-
-ScopedAutoreleasePool::ScopedAutoreleasePool() {
-  pool_ = [[NSAutoreleasePool alloc] init];
+std::string DescriptionFromOSStatus(OSStatus err) {
+  NSError* error =
+      [NSError errorWithDomain:NSOSStatusErrorDomain code:err userInfo:nil];
+  return error.description.UTF8String;
 }
-
-ScopedAutoreleasePool::~ScopedAutoreleasePool() {
-  [pool_ drain];
-}
-
 }  // namespace rtc