Added UMA statistics for change passwords in the Password Manager

components/password_manager/core/browser/password_manager_metrics_util.cc

Index: components/password_manager/core/browser/password_manager_metrics_util.cc
diff --git a/components/password_manager/core/browser/password_manager_metrics_util.cc b/components/password_manager/core/browser/password_manager_metrics_util.cc
index dc9a4a4b5a3e6228de23522bd6743c2ede5186c3..7689c119ef0331110c1a63f5df18ee48c7666115 100644
--- a/components/password_manager/core/browser/password_manager_metrics_util.cc
+++ b/components/password_manager/core/browser/password_manager_metrics_util.cc
@@ -169,6 +169,11 @@ void LogPasswordGenerationSubmissionEvent(PasswordSubmissionEvent event) {
                             SUBMISSION_EVENT_ENUM_COUNT);
 }
 
+void LogUpdatePasswordSubmissionEvent(UpdatePasswordSubmissionEvent event) {
+  UMA_HISTOGRAM_ENUMERATION("PasswordManager.UpdatePasswordSubmissionEvent",
+                            event, UPDATE_PASSWORD_EVENT_COUNT);

[Ilya Sherman, 2015/08/21 01:24:23]

If you keep the enum element that's past UPDATE_PASSWORD_EVENT_COUNT, please add
a DCHECK to this method to verify that it's never called with that enum value.

[dvadym, 2015/08/21 14:09:53]

Done.

+}
+
 }  // namespace metrics_util
 
 }  // namespace password_manager