Implement the UI logic behind the Sign In promo in the password bubble

components/password_manager/core/browser/password_manager_metrics_util.h

Index: components/password_manager/core/browser/password_manager_metrics_util.h
diff --git a/components/password_manager/core/browser/password_manager_metrics_util.h b/components/password_manager/core/browser/password_manager_metrics_util.h
index 9f22f7920d632ab43c55699aa1c620d1517fe020..5e5e01a6f030ce15afd951cee021d49280fc016c 100644
--- a/components/password_manager/core/browser/password_manager_metrics_util.h
+++ b/components/password_manager/core/browser/password_manager_metrics_util.h
@@ -130,6 +130,13 @@ enum AccountChooserUserAction {
   ACCOUNT_CHOOSER_ACTION_COUNT
 };
 
+enum SyncSignInUserAction {
+  CHROME_SIGNIN_DISMISSED,
+  CHROME_SIGNIN_OK,
+  CHROME_SIGNIN_CANCEL,
+  CHROME_SIGNIN_ACTION_COUNT
+};
+
 // A version of the UMA_HISTOGRAM_BOOLEAN macro that allows the |name|
 // to vary over the program's runtime.
 void LogUMAHistogramBoolean(const std::string& name, bool sample);
@@ -171,6 +178,9 @@ void LogAutoSigninPromoUserAction(AutoSigninPromoUserAction action);
 void LogAccountChooserUserActionOneAccount(AccountChooserUserAction action);
 void LogAccountChooserUserActionManyAccounts(AccountChooserUserAction action);
 
+// Log a user action on showing the Chrome sign in promo.
+void LogAutoSigninPromoUserAction(SyncSignInUserAction action);
+
 }  // namespace metrics_util
 
 }  // namespace password_manager