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

util/mach/exc_client_variants_test.cc

 // 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/mach/exc_client_variants.h"
 
 #include <mach/mach.h>
 #include <pthread.h>
 #include <string.h>
 
 #include "base/basictypes.h"
 #include "base/strings/stringprintf.h"
 #include "gtest/gtest.h"
 #include "util/mach/exc_server_variants.h"
 #include "util/mach/exception_behaviors.h"
 #include "util/mach/mach_extensions.h"
 #include "util/test/mac/mach_errors.h"
 #include "util/test/mac/mach_multiprocess.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-using namespace crashpad::test;
-
 class TestExcClientVariants : public UniversalMachExcServer,
                               public MachMultiprocess {
  public:
   TestExcClientVariants(exception_behavior_t behavior, bool all_fields)
       : UniversalMachExcServer(),
         MachMultiprocess(),
         behavior_(behavior),
         all_fields_(all_fields),
         handled_(false) {
     ++exception_;
@@ skipping 235 matching lines @@
     {
       SCOPED_TRACE("all_fields = true");
 
       TestExcClientVariants test_exc_client_variants(behavior, true);
       test_exc_client_variants.Run();
     }
   }
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad