[Autofill] Add upstreaming UKM

components/autofill/core/browser/autofill_metrics.h

Index: components/autofill/core/browser/autofill_metrics.h
diff --git a/components/autofill/core/browser/autofill_metrics.h b/components/autofill/core/browser/autofill_metrics.h
index 4127e9cd09d853a6b87b5e3fe77c4a8fb65c2ca2..26f3a38fade3ca30e3558be86f7ce48ebf411512 100644
--- a/components/autofill/core/browser/autofill_metrics.h
+++ b/components/autofill/core/browser/autofill_metrics.h
@@ -17,7 +17,11 @@
 
 namespace base {
 class TimeDelta;
-}
+}  // namespace base
+
+namespace ukm {
+class UkmService;
+}  // namespace ukm
 
 namespace autofill {
 
@@ -680,6 +684,13 @@ class AutofillMetrics {
   // suggestion to show an explanation of the warning.
   static void LogShowedHttpNotSecureExplanation();
 
+  // Logs the the |ukm| with the specified |url| and the specified |metrics|.
+  // Returns whether the ukm was sucessfully logged.
+  static bool LogUkm(ukm::UkmService* ukm_service,
+                     const GURL& url,
+                     const std::string& ukm,
+                     const std::map<std::string, int>& metrics);
+
   // Utility to autofill form events in the relevant histograms depending on
   // the presence of server and/or local data.
   class FormEventLogger {