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

util/mac/process_reader_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,
@@ skipping 22 matching lines @@
 #include "util/file/fd_io.h"
 #include "util/mac/mach_o_image_reader.h"
 #include "util/mach/mach_extensions.h"
 #include "util/stdlib/pointer_container.h"
 #include "util/synchronization/semaphore.h"
 #include "util/test/errors.h"
 #include "util/test/mac/dyld.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;
-
 TEST(ProcessReader, SelfBasic) {
   ProcessReader process_reader;
   ASSERT_TRUE(process_reader.Initialize(mach_task_self()));
 
 #if !defined(ARCH_CPU_64_BITS)
   EXPECT_FALSE(process_reader.Is64Bit());
 #else
   EXPECT_TRUE(process_reader.Is64Bit());
 #endif
 
@@ skipping 630 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ProcessReaderModulesChild);
 };
 
 TEST(ProcessReader, ChildModules) {
   ProcessReaderModulesChild process_reader_modules_child;
   process_reader_modules_child.Run();
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad