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

util/posix/process_util_test.cc

Index: util/posix/process_util_test.cc
diff --git a/util/posix/process_util_test.cc b/util/posix/process_util_test.cc
index 2fb6841ec8fe4f9fefffc1aefa69cb01281161b9..47b0dd5fe29d965d65d704b2dc93e2fbd544395a 100644
--- a/util/posix/process_util_test.cc
+++ b/util/posix/process_util_test.cc
@@ -22,10 +22,10 @@
 
 #include "gtest/gtest.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-
 TEST(ProcessUtil, ProcessArgumentsForPID) {
   std::vector<std::string> argv;
   ASSERT_TRUE(ProcessArgumentsForPID(getpid(), &argv));
@@ -45,3 +45,5 @@ TEST(ProcessUtil, ProcessArgumentsForPID) {
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad