[Autofill] Add user type metrics.

chrome/browser/autofill/autofill_metrics.cc

Index: chrome/browser/autofill/autofill_metrics.cc
diff --git a/chrome/browser/autofill/autofill_metrics.cc b/chrome/browser/autofill/autofill_metrics.cc
index c30028da05ee6e4ef6f668ad9994afcce02e087a..f3549a4f9710fc82794feb790e42cb297f5a777e 100644
--- a/chrome/browser/autofill/autofill_metrics.cc
+++ b/chrome/browser/autofill/autofill_metrics.cc
@@ -325,6 +325,14 @@ void AutofillMetrics::LogDialogUiDuration(
   LogUMAHistogramLongTimes(prefix + ".UiDuration." + suffix, duration);
 }
 
+void AutofillMetrics::LogDialogInitialUserState(
+    autofill::DialogType dialog_type,
+    DialogInitialUserStateMetric user_type) const {
+  std::string name = GetPrefixForDialogType(dialog_type) + ".InitialUserState";
+  LogUMAHistogramEnumeration(
+      name, user_type, NUM_DIALOG_INITIAL_USER_STATE_METRICS);
+}
+
 void AutofillMetrics::LogWalletErrorMetric(autofill::DialogType dialog_type,
                                            WalletErrorMetric metric) const {
   std::string name = GetPrefixForDialogType(dialog_type) + ".WalletErrors";