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

minidump/minidump_system_info_writer_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 "minidump/minidump_system_info_writer.h"
 
 #include <dbghelp.h>
 #include <string.h>
 
 #include <string>
 
 #include "gtest/gtest.h"
 #include "minidump/minidump_file_writer.h"
 #include "minidump/minidump_test_util.h"
 #include "util/file/string_file_writer.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-using namespace crashpad::test;
-
 void GetSystemInfoStream(const std::string& file_contents,
                          size_t csd_version_length,
                          const MINIDUMP_SYSTEM_INFO** system_info,
                          const MINIDUMP_STRING** csd_version) {
   // The expected number of bytes for the CSD version’s MINIDUMP_STRING::Buffer.
   const size_t kCSDVersionBytes =
       csd_version_length * sizeof(MINIDUMP_STRING::Buffer[0]);
   const size_t kCSDVersionBytesWithNUL =
       kCSDVersionBytes + sizeof(MINIDUMP_STRING::Buffer[0]);
 
@@ skipping 246 matching lines @@
   MinidumpFileWriter minidump_file_writer;
   MinidumpSystemInfoWriter system_info_writer;
   minidump_file_writer.AddStream(&system_info_writer);
 
   StringFileWriter file_writer;
   ASSERT_DEATH(minidump_file_writer.WriteEverything(&file_writer),
                "csd_version_");
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad