Reland of move all reference to carbon api

webrtc/base/iosfilesystem.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
-// (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() {
-  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() {
-  return copyString(NSTemporaryDirectory());
-}
-
-// Return the binary's path.
-void IOSAppName(rtc::Pathname* path) {
-  NSProcessInfo *pInfo = [NSProcessInfo processInfo];
-  NSString* argv0 = [[pInfo arguments] objectAtIndex:0];
-  path->SetPathname([argv0 UTF8String]);
-}