Add user metrics for the login screen.

chrome/browser/chromeos/login/login_screen.cc

Index: chrome/browser/chromeos/login/login_screen.cc
diff --git a/chrome/browser/chromeos/login/login_screen.cc b/chrome/browser/chromeos/login/login_screen.cc
index 0efde849e28b6925035d7d10ff54ec3a3d1f4cea..4ec6306e800adc8342ff323e7b58743c3ca7197f 100644
--- a/chrome/browser/chromeos/login/login_screen.cc
+++ b/chrome/browser/chromeos/login/login_screen.cc
@@ -77,6 +77,8 @@ void LoginScreen::ClearErrors() {
 }
 
 void LoginScreen::OnLoginFailure(const LoginFailure& failure) {
+  UserMetrics::RecordAction(UserMetricsAction("LoginScreen_LoginFailure"));

[Nikita (slow), 2010/11/29 10:59:06]

I think it's better to track error codes here as well.
See histogram Net.ErrorCodesForMainFrame for instance.

[satorux1, 2010/12/02 10:41:46]

Good idea, done.

+
   const std::string error = failure.GetErrorString();
   VLOG(1) << "LoginManagerView: OnLoginFailure() " << error;
   NetworkLibrary* network = CrosLibrary::Get()->GetNetworkLibrary();
@@ -99,6 +101,7 @@ void LoginScreen::OnLoginSuccess(
     const std::string& password,
     const GaiaAuthConsumer::ClientLoginResult& credentials,
     bool pending_requests) {
+  UserMetrics::RecordAction(UserMetricsAction("LoginScreen_LoginSuccess"));
 
   delegate()->GetObserver(this)->OnExit(ScreenObserver::LOGIN_SIGN_IN_SELECTED);
   AppendStartUrlToCmdline();
@@ -106,6 +109,9 @@ void LoginScreen::OnLoginSuccess(
 }
 
 void LoginScreen::OnOffTheRecordLoginSuccess() {
+  UserMetrics::RecordAction(
+      UserMetricsAction("LoginScreen_OffTheRecordLoginSuccess"));
+
   LoginUtils::Get()->CompleteOffTheRecordLogin(start_url_);
 }