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 1de2597abf29d124001ea68b7bb7f569ccf86b05..14ccde8dde24d3adceb36d614a1157242668b8cc 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"
@@ -40,7 +41,8 @@ class LoginDisplayHost;
 class ExistingUserController : public LoginDisplay::Delegate,
                                public content::NotificationObserver,
                                public LoginPerformer::Delegate,
-                               public LoginUtils::Delegate {
+                               public LoginUtils::Delegate,
+                               public ash::UserActivityObserver {
  public:
   // All UI initialization is deferred till Init() call.
   explicit ExistingUserController(LoginDisplayHost* host);
@@ -61,6 +63,12 @@ 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();
+
   // LoginDisplay::Delegate: implementation
   virtual void CancelPasswordChangedFlow() OVERRIDE;
   virtual void CreateAccount() OVERRIDE;
@@ -75,6 +83,7 @@ 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;
@@ -107,8 +116,15 @@ class ExistingUserController : public LoginDisplay::Delegate,
 
  private:
   friend class ExistingUserControllerTest;
+  friend class ExistingUserControllerPublicSessionTest;
   friend class MockLoginPerformerDelegate;
 
+  // Retrieve public session auto-login policy and update the timer.
+  void ConfigurePublicSessionAutoLogin();
+
+  // Trigger public session auto-login.
+  void OnPublicSessionAutoLoginTimerFire();
+
   // LoginPerformer::Delegate implementation:
   virtual void OnLoginFailure(const LoginFailure& error) OVERRIDE;
   virtual void OnLoginSuccess(
@@ -126,6 +142,9 @@ class ExistingUserController : public LoginDisplay::Delegate,
   // LoginUtils::Delegate implementation:
   virtual void OnProfilePrepared(Profile* profile) OVERRIDE;
 
+  // UserActivityObserver::Observer implementation.
+  virtual void OnUserActivity() OVERRIDE;
+
   // Starts WizardController with the specified screen.
   void ActivateWizard(const std::string& screen_name);
 
@@ -189,6 +208,18 @@ class ExistingUserController : public LoginDisplay::Delegate,
   // Updates the |login_display_| attached to this controller.
   void UpdateLoginDisplay(const UserList& users);
 
+  // Accesses (and lazily constructs if necessary) the auto-login timer.
+  base::OneShotTimer<ExistingUserController>& auto_login_timer();
+
+  // Public session auto-login timer.
+  scoped_ptr<base::OneShotTimer<ExistingUserController> > auto_login_timer_;
+
+  // Public session auto-login timeout, in milliseconds.
+  int public_session_auto_login_delay_;
+
+  // Username for public session auto-login.
+  std::string public_session_auto_login_username_;
+
   // Used to execute login operations.
   scoped_ptr<LoginPerformer> login_performer_;
 
@@ -249,6 +280,9 @@ 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_;
 
@@ -263,6 +297,12 @@ class ExistingUserController : public LoginDisplay::Delegate,
   base::OneShotTimer<ExistingUserController> reboot_timer_;
 
   FRIEND_TEST_ALL_PREFIXES(ExistingUserControllerTest, ExistingUserLogin);
+  FRIEND_TEST_ALL_PREFIXES(ExistingUserControllerPublicSessionTest,
+                           ConfigureAutoLogin);
+  FRIEND_TEST_ALL_PREFIXES(ExistingUserControllerPublicSessionTest,
+                           UserActivityRestartsAutoLogin);
+  FRIEND_TEST_ALL_PREFIXES(ExistingUserControllerPublicSessionTest,
+                           OnAutoLoginFire);
 
   DISALLOW_COPY_AND_ASSIGN(ExistingUserController);
 };