ChromeOS login webui refactoring : Simplify login methods.

chrome/browser/chromeos/login/existing_user_controller.cc

Index: chrome/browser/chromeos/login/existing_user_controller.cc
diff --git a/chrome/browser/chromeos/login/existing_user_controller.cc b/chrome/browser/chromeos/login/existing_user_controller.cc
index 7be9133ab4c40b6cf5a55a12ff71e01d7047822d..8e0690923b47e0414be4cb41bd6629ea7cae3e92 100644
--- a/chrome/browser/chromeos/login/existing_user_controller.cc
+++ b/chrome/browser/chromeos/login/existing_user_controller.cc
@@ -381,7 +381,28 @@ bool ExistingUserController::IsSigninInProgress() const {
   return is_login_in_progress_;
 }
 
-void ExistingUserController::Login(const UserContext& user_context) {
+void ExistingUserController::Login(const UserContext& user_context,
+                                   const SigninSpecifics& specifics) {
+  if (user_context.GetUserType() == User::USER_TYPE_GUEST) {
+    if (!specifics.guest_mode_url.empty()) {
+      guest_mode_url_ = GURL(specifics.guest_mode_url);
+      if (specifics.guest_mode_url_append_locale)
+        guest_mode_url_ = google_util::AppendGoogleLocaleParam(
+            guest_mode_url_, g_browser_process->GetApplicationLocale());
+    }
+    LoginAsGuest();
+    return;
+  } else if (user_context.GetUserType() == User::USER_TYPE_PUBLIC_ACCOUNT) {
+    LoginAsPublicAccount(user_context.GetUserID());
+    return;
+  } else if (user_context.GetUserType() == User::USER_TYPE_RETAIL_MODE) {
+    LoginAsRetailModeUser();
+    return;
+  } else if (user_context.GetUserType() == User::USER_TYPE_KIOSK_APP) {
+    LoginAsKioskApp(user_context.GetUserID(), specifics.kiosk_diagnostic_mode);
+    return;
+  }
+
   if (!user_context.HasCredentials())
     return;
 
@@ -572,11 +593,6 @@ void ExistingUserController::OnSigninScreenReady() {
   StartPublicSessionAutoLoginTimer();
 }
 
-void ExistingUserController::OnUserSelected(const std::string& username) {
-  login_performer_.reset(NULL);
-  num_login_attempts_ = 0;
-}
-
 void ExistingUserController::OnStartEnterpriseEnrollment() {
   if (KioskAppManager::Get()->IsConsumerKioskDeviceWithAutoLaunch()) {
     LOG(WARNING) << "Enterprise enrollment is not available after kiosk auto "