Implement a policy to autologin a public account.

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 0cf370e5eaffb717f5cfdc32ff4e795bfeae8f30..8e6cd6a4593fae32ac00b4d74251c642f1acba4d 100644
--- a/chrome/browser/chromeos/login/existing_user_controller.cc
+++ b/chrome/browser/chromeos/login/existing_user_controller.cc
@@ -144,7 +144,8 @@ ExistingUserController::ExistingUserController(LoginDisplayHost* host)
       offline_failed_(false),
       is_login_in_progress_(false),
       password_changed_(false),
-      do_auto_enrollment_(false) {
+      do_auto_enrollment_(false),
+      signin_screen_ready_(false) {
   DCHECK(current_controller_ == NULL);
   current_controller_ = this;
 
@@ -164,6 +165,12 @@ ExistingUserController::ExistingUserController(LoginDisplayHost* host)
   cros_settings_->AddSettingsObserver(kAccountsPrefAllowNewUser, this);
   cros_settings_->AddSettingsObserver(kAccountsPrefAllowGuest, this);
   cros_settings_->AddSettingsObserver(kAccountsPrefUsers, this);
+  cros_settings_->AddSettingsObserver(
+      kAccountsPrefDeviceLocalAccountAutoLoginUsername,
+      this);
+  cros_settings_->AddSettingsObserver(
+      kAccountsPrefDeviceLocalAccountAutoLoginTimerMillis,

[bartfab (slow), 2013/02/08 18:38:42]

We tend to abbreviate milliseconds as "Ms, not "Millis"

[dconnelly, 2013/02/08 19:20:42]

Done.

+      this);
 }
 
 void ExistingUserController::Init(const UserList& users) {
@@ -229,6 +236,12 @@ void ExistingUserController::Observe(
     registrar_.RemoveAll();
     return;
   }
+  if (type == chrome::NOTIFICATION_SYSTEM_SETTING_CHANGED) {
+    std::string setting = *content::Details<const std::string>(details).ptr();
+    if (setting == kAccountsPrefDeviceLocalAccountAutoLoginUsername ||
+        setting == kAccountsPrefDeviceLocalAccountAutoLoginTimerMillis)
+      StartAutoLoginTimer();
+  }
   if (type == chrome::NOTIFICATION_SYSTEM_SETTING_CHANGED ||
       type == chrome::NOTIFICATION_POLICY_USER_LIST_CHANGED) {
     if (host_ != NULL) {
@@ -278,6 +291,12 @@ ExistingUserController::~ExistingUserController() {
   cros_settings_->RemoveSettingsObserver(kAccountsPrefAllowNewUser, this);
   cros_settings_->RemoveSettingsObserver(kAccountsPrefAllowGuest, this);
   cros_settings_->RemoveSettingsObserver(kAccountsPrefUsers, this);
+  cros_settings_->RemoveSettingsObserver(
+      kAccountsPrefDeviceLocalAccountAutoLoginUsername,
+      this);
+  cros_settings_->RemoveSettingsObserver(
+      kAccountsPrefDeviceLocalAccountAutoLoginTimerMillis,
+      this);
 
   if (current_controller_ == this) {
     current_controller_ = NULL;
@@ -412,6 +431,9 @@ void ExistingUserController::PerformLogin(
   login_display_->SetUIEnabled(false);
   resume_login_callback_.Reset();
 
+  // Stop the autologin timer when attempting login.
+  StopAutoLoginTimer();
+
   // Use the same LoginPerformer for subsequent login as it has state
   // such as Authenticator instance.
   if (!login_performer_.get() || num_login_attempts_ <= 1) {
@@ -440,6 +462,9 @@ void ExistingUserController::LoginAsRetailModeUser() {
   // TODO(rkc): Add a CHECK to make sure retail mode logins are allowed once
   // the enterprise policy wiring is done for retail mode.
 
+  // Stop the autologin timer when attempting login.
+  StopAutoLoginTimer();
+
   // Only one instance of LoginPerformer should exist at a time.
   login_performer_.reset(NULL);
   login_performer_.reset(new LoginPerformer(this));
@@ -485,6 +510,9 @@ void ExistingUserController::LoginAsGuest() {
     return;
   }
 
+  // Stop the autologin timer when attempting login.
+  StopAutoLoginTimer();
+
   // Only one instance of LoginPerformer should exist at a time.
   login_performer_.reset(NULL);
   login_performer_.reset(new LoginPerformer(this));
@@ -532,6 +560,9 @@ void ExistingUserController::LoginAsPublicAccount(
     return;
   }
 
+  // Stop the autologin timer when attempting login.
+  StopAutoLoginTimer();
+
   // Only one instance of LoginPerformer should exist at a time.
   login_performer_.reset(NULL);
   login_performer_.reset(new LoginPerformer(this));
@@ -541,6 +572,11 @@ void ExistingUserController::LoginAsPublicAccount(
       l10n_util::GetStringUTF8(IDS_CHROMEOS_ACC_LOGIN_SIGNIN_PUBLIC_ACCOUNT));
 }
 
+void ExistingUserController::OnSigninScreenReady() {
+  signin_screen_ready_ = true;
+  StartAutoLoginTimer();
+}
+
 void ExistingUserController::OnUserSelected(const std::string& username) {
   login_performer_.reset(NULL);
   num_login_attempts_ = 0;
@@ -681,6 +717,8 @@ void ExistingUserController::OnLoginFailure(const LoginFailure& failure) {
 
   // Clear the recorded displayed email so it won't affect any future attempts.
   display_email_.clear();
+
+  StartAutoLoginTimer();
 }
 
 void ExistingUserController::OnLoginSuccess(
@@ -840,6 +878,9 @@ void ExistingUserController::PolicyLoadFailed() {
   login_display_->SetUIEnabled(true);
 
   display_email_.clear();
+
+  // Policy load failure stops login attempts--restart the timer.
+  StartAutoLoginTimer();
 }
 
 void ExistingUserController::OnOnlineChecked(const std::string& username,
@@ -881,6 +922,32 @@ void ExistingUserController::ActivateWizard(const std::string& screen_name) {
   host_->StartWizard(screen_name, params);
 }
 
+void ExistingUserController::StopAutoLoginTimer() {
+  auto_login_timer_.Stop();
+}
+
+void ExistingUserController::StartAutoLoginTimer() {
+  if (!signin_screen_ready_)
+    return;
+
+  std::string username;
+  if (cros_settings_->GetString(
+          kAccountsPrefDeviceLocalAccountAutoLoginUsername,
+          &username) && !username.empty()) {
+    int timer;
+    if (!cros_settings_->GetInteger(
+            kAccountsPrefDeviceLocalAccountAutoLoginTimerMillis,
+            &timer))
+      timer = 0;

[bartfab (slow), 2013/02/08 18:38:42]

multi-line if => style guide requires curly braces {}

[dconnelly, 2013/02/08 19:20:42]

Done.

+    auto_login_timer_.Start(FROM_HERE,
+                            base::TimeDelta::FromMilliseconds(timer),
+                            base::Bind(
+                                &ExistingUserController::LoginAsPublicAccount,
+                                weak_factory_.GetWeakPtr(),
+                                username));
+  }
+}
+
 gfx::NativeWindow ExistingUserController::GetNativeWindow() const {
   return host_->GetNativeWindow();
 }