Revert of Don't set cpu architecture field on iOS in UMA logs. (patchset #2 id:20001 of https://cod…

components/metrics/metrics_log_unittest.cc

Index: components/metrics/metrics_log_unittest.cc
diff --git a/components/metrics/metrics_log_unittest.cc b/components/metrics/metrics_log_unittest.cc
index f1a7792f85d45bb5996b2eb9ee808ddde54bf286..63152c68ea9baa5203177f4d4e45ad52c1398794 100644
--- a/components/metrics/metrics_log_unittest.cc
+++ b/components/metrics/metrics_log_unittest.cc
@@ -196,9 +196,7 @@ TEST_F(MetricsLogTest, BasicRecord) {
 #endif
   metrics::SystemProfileProto::Hardware* hardware =
       system_profile->mutable_hardware();
-#if !defined(OS_IOS)
   hardware->set_cpu_architecture(base::SysInfo::OperatingSystemArchitecture());
-#endif
   hardware->set_system_ram_mb(base::SysInfo::AmountOfPhysicalMemoryMB());
   hardware->set_hardware_class(base::SysInfo::HardwareModelName());
 #if defined(OS_WIN)