Reland of move all reference to carbon api

webrtc/base/applefilesystem.mm

 /*
  *  Copyright 2014 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.
  */
 
-// This file only exists because various iOS system APIs are only
-// available from Objective-C.  See unixfilesystem.cc for the only use
+// This file only exists because various iOS and macOS system APIs are only
+// available from Objective-C. See unixfilesystem.cc for the only use
 // (enforced by a lack of a header file).
 
 #import <Foundation/NSPathUtilities.h>
 #import <Foundation/NSProcessInfo.h>
 #include <string.h>
 
 #include "webrtc/base/common.h"
 #include "webrtc/base/pathutils.h"
 
 // Return a new[]'d |char*| copy of the UTF8 representation of |s|.
 // Caller owns the returned memory and must use delete[] on it.
 static char* copyString(NSString* s) {
   const char* utf8 = [s UTF8String];
   size_t len = strlen(utf8) + 1;
   char* copy = new char[len];
   // This uses a new[] + strcpy (instead of strdup) because the
   // receiver expects to be able to delete[] the returned pointer
   // (instead of free()ing it).
   strcpy(copy, utf8);
   return copy;
 }
 
 // Return a (leaked) copy of a directory name suitable for application data.
-char* IOSDataDirectory() {
+char* AppleDataDirectory() {
   NSArray* paths = NSSearchPathForDirectoriesInDomains(
       NSApplicationSupportDirectory, NSUserDomainMask, YES);
   ASSERT([paths count] == 1);
   return copyString([paths objectAtIndex:0]);
 }
 
 // Return a (leaked) copy of a directory name suitable for use as a $TEMP.
-char* IOSTempDirectory() {
+char* AppleTempDirectory() {
   return copyString(NSTemporaryDirectory());
 }
 
 // Return the binary's path.
-void IOSAppName(rtc::Pathname* path) {
-  NSProcessInfo *pInfo = [NSProcessInfo processInfo];
+void AppleAppName(rtc::Pathname* path) {
+  NSProcessInfo* pInfo = [NSProcessInfo processInfo];
   NSString* argv0 = [[pInfo arguments] objectAtIndex:0];
   path->SetPathname([argv0 UTF8String]);
 }