Implement a policy to autologin a public account.

chrome/browser/chromeos/login/existing_user_controller.h

Index: chrome/browser/chromeos/login/existing_user_controller.h
diff --git a/chrome/browser/chromeos/login/existing_user_controller.h b/chrome/browser/chromeos/login/existing_user_controller.h
index 73e5f0db2d94cfb3e2dbc6a4f784aa0c62732848..63ba211b8f0ccf4dea3146a0b80cbbe61e4fc000 100644
--- a/chrome/browser/chromeos/login/existing_user_controller.h
+++ b/chrome/browser/chromeos/login/existing_user_controller.h
@@ -7,6 +7,7 @@
 
 #include <string>
 
+#include "ash/wm/user_activity_observer.h"
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
@@ -42,7 +43,8 @@ class ExistingUserController : public LoginDisplay::Delegate,
                                public content::NotificationObserver,
                                public LoginPerformer::Delegate,
                                public LoginUtils::Delegate,
-                               public PasswordChangedView::Delegate {
+                               public PasswordChangedView::Delegate,
+                               public ash::UserActivityObserver {
  public:
   // All UI initialization is deferred till Init() call.
   explicit ExistingUserController(LoginDisplayHost* host);
@@ -63,6 +65,15 @@ class ExistingUserController : public LoginDisplay::Delegate,
   // Tells the controller to resume a pending login.
   void ResumeLogin();
 
+  // Start the public session auto-login timer.
+  void StartPublicSessionAutoLoginTimer();
+
+  // Stop the public session auto-login timer when a login attempt begins.
+  void StopPublicSessionAutoLoginTimer();
+
+  // UserActivityObserver::Observer overrides:

[bartfab (slow), 2013/02/11 17:11:21]

nit:

s/overrides/implementation/
or
s/overrides//

[dconnelly, 2013/02/11 17:21:41]

Done.

+  virtual void OnUserActivity() OVERRIDE;
+
   // LoginDisplay::Delegate: implementation
   virtual void CancelPasswordChangedFlow() OVERRIDE;
   virtual void CreateAccount() OVERRIDE;
@@ -77,6 +88,7 @@ class ExistingUserController : public LoginDisplay::Delegate,
   virtual void LoginAsRetailModeUser() OVERRIDE;
   virtual void LoginAsGuest() OVERRIDE;
   virtual void LoginAsPublicAccount(const std::string& username) OVERRIDE;
+  virtual void OnSigninScreenReady() OVERRIDE;
   virtual void OnUserSelected(const std::string& username) OVERRIDE;
   virtual void OnStartEnterpriseEnrollment() OVERRIDE;
   virtual void OnStartDeviceReset() OVERRIDE;
@@ -110,6 +122,9 @@ class ExistingUserController : public LoginDisplay::Delegate,
   friend class ExistingUserControllerTest;
   friend class MockLoginPerformerDelegate;
 
+  // Retrieve public session auto-login policy and update the timer.
+  void ConfigurePublicSessionAutoLogin();
+
   // LoginPerformer::Delegate implementation:
   virtual void OnLoginFailure(const LoginFailure& error) OVERRIDE;
   virtual void OnLoginSuccess(
@@ -194,6 +209,15 @@ class ExistingUserController : public LoginDisplay::Delegate,
   // Updates the |login_display_| attached to this controller.
   void UpdateLoginDisplay(const UserList& users);
 
+  // Public session auto-login timer.
+  base::OneShotTimer<ExistingUserController> auto_login_timer_;
+
+  // Public session auto-login timeout, in milliseconds.
+  int public_session_auto_login_timer_;

[bartfab (slow), 2013/02/11 17:11:21]

nit: Calling this "timer" is not really accurate. It should be "timeout" or,
even better, matching the policy, "delay".

[dconnelly, 2013/02/11 17:21:41]

Done.

+
+  // Username for public session auto-login.
+  std::string public_session_auto_login_username_;

[bartfab (slow), 2013/02/11 17:11:21]

I think in the case of device local accounts (aka public accounts, aka public
sessions), Mattias called this "account id", not "username". But it's the same
thing, so treat this comment as a non-actionable FYI.

+
   // Used to execute login operations.
   scoped_ptr<LoginPerformer> login_performer_;
 
@@ -257,6 +281,9 @@ class ExistingUserController : public LoginDisplay::Delegate,
   // session.
   bool do_auto_enrollment_;
 
+  // Whether the sign-in UI is finished loading.
+  bool signin_screen_ready_;
+
   // The username used for auto-enrollment, if it was triggered.
   std::string auto_enrollment_username_;