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

util/mac/launchd_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,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include "util/mac/launchd.h"
 
 #import <Foundation/Foundation.h>
 #include <launch.h>
 #include <string.h>
 
 #include <cmath>
 #include <limits>
 
 #include "base/basictypes.h"
 #include "base/mac/scoped_launch_data.h"
 #include "gtest/gtest.h"
 #include "util/stdlib/objc.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-
 TEST(Launchd, CFPropertyToLaunchData_Integer) {
   @autoreleasepool {
     base::mac::ScopedLaunchData launch_data;
 
     NSNumber* integer_nses[] = {
       @0,
       @1,
       @-1,
       @0x7f,
       @0x80,
@@ skipping 251 matching lines @@
 
     launch_sublookup_data = launch_data_dict_lookup(
         launch_lookup_data, "com.example.service.rebooter");
     ASSERT_TRUE(launch_sublookup_data);
     ASSERT_EQ(LAUNCH_DATA_BOOL, launch_data_get_type(launch_sublookup_data));
     EXPECT_TRUE(launch_data_get_bool(launch_sublookup_data));
   }
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad