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

util/mac/process_reader_test.cc

Index: util/mac/process_reader_test.cc
diff --git a/util/mac/process_reader_test.cc b/util/mac/process_reader_test.cc
index 795468f540c6ffd447fb075d3396bd401ae86109..e67c98e8de65205d528e47966d9ab2f501504c03 100644
--- a/util/mac/process_reader_test.cc
+++ b/util/mac/process_reader_test.cc
@@ -40,11 +40,10 @@
 #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()));
@@ -695,3 +694,5 @@ TEST(ProcessReader, ChildModules) {
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad