Record UMA reporting default state as opt-out

chrome/browser/metrics/chrome_metrics_service_client.cc

Index: chrome/browser/metrics/chrome_metrics_service_client.cc
diff --git a/chrome/browser/metrics/chrome_metrics_service_client.cc b/chrome/browser/metrics/chrome_metrics_service_client.cc
index ab025e49ec5ad4c50b4b4a1217ba5611dbfb28a0..8cd66d4db17000b03bc145324e92879ac9c0c5a2 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.cc
+++ b/chrome/browser/metrics/chrome_metrics_service_client.cc
@@ -476,6 +476,15 @@ void ChromeMetricsServiceClient::Initialize() {
       new SigninStatusMetricsProviderChromeOS;
   metrics_service_->RegisterMetricsProvider(
       std::unique_ptr<metrics::MetricsProvider>(signin_metrics_provider_cros));
+
+  // Record default UMA state as opt-out for all Chrome OS users, if not
+  // recorded yet.
+  PrefService* local_state = g_browser_process->local_state();
+  if (metrics::GetMetricsReportingDefaultState(local_state) ==
+      metrics::EnableMetricsDefault::DEFAULT_UNKNOWN) {
+    metrics::RecordMetricsReportingDefaultState(
+        local_state, metrics::EnableMetricsDefault::OPT_OUT);
+  }
 #endif  // defined(OS_CHROMEOS)
 
 #if !defined(OS_CHROMEOS)