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

snapshot/system_snapshot_mac_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 "snapshot/system_snapshot_mac.h"
 
 #include <sys/time.h>
 #include <time.h>
 
 #include <string>
 
 #include "build/build_config.h"
 #include "gtest/gtest.h"
 #include "util/mac/mac_util.h"
 #include "util/mac/process_reader.h"
 #include "util/test/errors.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-using namespace crashpad::test;
-
 // SystemSnapshotMac objects would be cumbersome to construct in each test that
 // requires one, because of the repetitive and mechanical work necessary to set
 // up a ProcessReader and timeval, along with the checks to verify that these
 // operations succeed. This test fixture class handles the initialization work
 // so that individual tests don’t have to.
 class SystemSnapshotMacTest : public testing::Test {
  public:
   SystemSnapshotMacTest()
       : Test(),
         process_reader_(),
@@ skipping 123 matching lines @@
     int dst_delta_seconds = daylight_offset_seconds - standard_offset_seconds;
     if (dst_delta_seconds != 60 * 60 && dst_delta_seconds != 30 * 60) {
       FAIL() << "dst_delta_seconds " << dst_delta_seconds;
     }
 
     EXPECT_NE(standard_name, daylight_name);
   }
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad