Don’t use using directives (“using namespace”) in tests

util/mac/service_management_test.mm

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 12 matching lines @@
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/rand_util.h"
 #include "gtest/gtest.h"
 #include "util/misc/clock.h"
 #include "util/posix/process_util.h"
 #include "util/stdlib/objc.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-
 // Ensures that the process with the specified PID is running, identifying it by
 // requiring that its argv[argc - 1] compare equal to last_arg.
 void ExpectProcessIsRunning(pid_t pid, std::string& last_arg) {
   // The process may not have called exec yet, so loop with a small delay while
   // looking for the cookie.
   int outer_tries = 10;
   std::vector<std::string> job_argv;
   while (outer_tries--) {
     // If the process is in the middle of calling exec, ProcessArgumentsForPID
     // may fail. Loop with a small retry delay while waiting for the expected
@@ skipping 102 matching lines @@
 
     // Now that the job is unloaded, a subsequent attempt to unload it should be
     // an error.
     EXPECT_FALSE(ServiceManagementRemoveJob(kJobLabel, false));
 
     ExpectProcessIsNotRunning(job_pid, shell_script);
   }
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad