[Autofill] Add user type metrics.

components/autofill/browser/autofill_metrics.cc

Index: components/autofill/browser/autofill_metrics.cc
diff --git a/components/autofill/browser/autofill_metrics.cc b/components/autofill/browser/autofill_metrics.cc
index 11530a6ce54836a46a08ecfcc9f4fb38ac19788e..8154280af863167ddb73b8a6fe2e4b95c9ca558b 100644
--- a/components/autofill/browser/autofill_metrics.cc
+++ b/components/autofill/browser/autofill_metrics.cc
@@ -296,6 +296,14 @@ void AutofillMetrics::LogCreditCardInfoBarMetric(InfoBarMetric metric) const {
                             NUM_INFO_BAR_METRICS);
 }
 
+void AutofillMetrics::LogDialogInitialUserState(
+    autofill::DialogType dialog_type,
+    DialogInitialUserStateMetric user_type) const {

[Dan Beam, 2013/03/12 14:59:32]

DCHECK_NE(UNKNOWN_TYPE, user_type);

[Ilya Sherman, 2013/03/12 20:51:27]

This DCHECK wouldn't be valid, since it's possible that none of the Wallet
requests succeeded.

+  std::string name = GetPrefixForDialogType(dialog_type) + ".InitialUserState";
+  LogUMAHistogramEnumeration(
+      name, user_type, NUM_DIALOG_INITIAL_USER_STATE_METRICS);
+}
+
 void AutofillMetrics::LogDialogSecurityMetric(
     autofill::DialogType dialog_type,
     DialogSecurityMetric metric) const {