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

util/mac/process_types_test.cc

Index: util/mac/process_types_test.cc
diff --git a/util/mac/process_types_test.cc b/util/mac/process_types_test.cc
index 80abe75159350bc1d36df2e74c632f9f8b769de5..93ecc2aa2a8474a9e41400e698a34ae4820de328 100644
--- a/util/mac/process_types_test.cc
+++ b/util/mac/process_types_test.cc
@@ -25,10 +25,10 @@
 #include "util/mac/mac_util.h"
 #include "util/test/mac/dyld.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-
 #define TEST_STRING(process_reader, self_view, proctype_view, field)        \
   do {                                                                      \
     if (self_view->field) {                                                 \
@@ -259,3 +259,5 @@ TEST(ProcessTypes, DyldImagesSelf) {
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad