Move a couple of utility functions to a new namespace_utils class.

sandbox/linux/services/credentials_unittest.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 "sandbox/linux/services/credentials.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <sys/stat.h>
@@ skipping 53 matching lines @@
     fprintf(stdout, "This kernel does not support unprivileged namespaces. "
             "USERNS tests will succeed without running.\n");
     fflush(stdout);
     return;
   }
   CHECK(Credentials::HasAnyCapability());
   CHECK(Credentials::DropAllCapabilities());
   CHECK(!Credentials::HasAnyCapability());
 }
 
-SANDBOX_TEST(Credentials, SupportsUserNS) {
+SANDBOX_TEST(Credentials, CanCreateProcessInNewUserNS) {
   CHECK(Credentials::DropAllCapabilities());
-  bool user_ns_supported = Credentials::SupportsNewUserNS();
+  bool user_ns_supported = Credentials::CanCreateProcessInNewUserNS();
   bool moved_to_new_ns = Credentials::MoveToNewUserNS();
   CHECK_EQ(user_ns_supported, moved_to_new_ns);
 }
 
 SANDBOX_TEST(Credentials, UidIsPreserved) {
   CHECK(Credentials::DropAllCapabilities());
   uid_t old_ruid, old_euid, old_suid;
   gid_t old_rgid, old_egid, old_sgid;
   PCHECK(0 == getresuid(&old_ruid, &old_euid, &old_suid));
   PCHECK(0 == getresgid(&old_rgid, &old_egid, &old_sgid));
@@ skipping 59 matching lines @@
 // it is not possible to regain capabilities.
 SANDBOX_TEST(Credentials, DISABLE_ON_LSAN(CannotRegainPrivileges)) {
   CHECK(Credentials::DropAllCapabilities());
   // Probably missing kernel support.
   if (!Credentials::MoveToNewUserNS()) return;
   CHECK(Credentials::DropFileSystemAccess());
   CHECK(Credentials::DropAllCapabilities());
 
   // The kernel should now prevent us from regaining capabilities because we
   // are in a chroot.
-  CHECK(!Credentials::SupportsNewUserNS());
+  CHECK(!Credentials::CanCreateProcessInNewUserNS());
   CHECK(!Credentials::MoveToNewUserNS());
 }
 
 }  // namespace.
 
 }  // namespace sandbox.