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

util/misc/initialization_state_dcheck_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/misc/initialization_state_dcheck.h"
 
 #include "base/logging.h"
 #include "gtest/gtest.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-
 TEST(InitializationStateDcheck, InitializationStateDcheck) {
   InitializationStateDcheck initialization_state_dcheck;
   INITIALIZATION_STATE_SET_INITIALIZING(initialization_state_dcheck);
   INITIALIZATION_STATE_SET_VALID(initialization_state_dcheck);
   INITIALIZATION_STATE_DCHECK_VALID(initialization_state_dcheck);
 }
 
 #if DCHECK_IS_ON
 
 // InitializationStateDcheck only DCHECKs, so the death tests can only run
@@ skipping 85 matching lines @@
     INITIALIZATION_STATE_DCHECK_VALID(initialization_state_dcheck);
   }
   ASSERT_DEATH(
       INITIALIZATION_STATE_DCHECK_VALID(*initialization_state_dcheck_pointer),
       "kStateValid");
 }
 
 #endif
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad