Implement users options handling in login screen.

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 a41dea613980d1ca0bf56b2256b806be8d87a4cb..95534a5de5b03cbd4963ac846f7eb39af2716cee 100644
--- a/chrome/browser/chromeos/login/existing_user_controller.h
+++ b/chrome/browser/chromeos/login/existing_user_controller.h
@@ -20,6 +20,7 @@
 #include "chrome/browser/chromeos/login/password_changed_view.h"
 #include "chrome/browser/chromeos/login/user_controller.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
+#include "chrome/browser/chromeos/login/signed_settings_helper.h"
 #include "chrome/browser/chromeos/wm_message_listener.h"
 #include "chrome/common/net/gaia/gaia_auth_consumer.h"
 #include "chrome/common/net/gaia/google_service_auth_error.h"
@@ -47,7 +48,8 @@ class ExistingUserController : public WmMessageListener::Observer,
                                public LoginStatusConsumer,
                                public MessageBubbleDelegate,
                                public CaptchaView::Delegate,
-                               public PasswordChangedView::Delegate {
+                               public PasswordChangedView::Delegate,
+                               public SignedSettingsHelper::Callback {
  public:
   // Initializes views for known users. |background_bounds| determines the
   // bounds of background view.
@@ -116,6 +118,10 @@ class ExistingUserController : public WmMessageListener::Observer,
   virtual void RecoverEncryptedData(const std::string& old_password);
   virtual void ResyncEncryptedData();
 
+  // SignedSettingsHelper::Callback
+  virtual void OnCheckWhiteListCompleted(bool success,
+                                         const std::string& email);
+
   // Adds start url to command line.
   void AppendStartUrlToCmdline();
 
@@ -133,6 +139,9 @@ class ExistingUserController : public WmMessageListener::Observer,
   // Send message to window manager to enable/disable click on other windows.
   void SendSetLoginState(bool is_login);
 
+  // Starts authentication.
+  void StartAuthentication();
+
   // Bounds of the background window.
   const gfx::Rect background_bounds_;
 
@@ -186,6 +195,9 @@ class ExistingUserController : public WmMessageListener::Observer,
   // Help application used for help dialogs.
   scoped_ptr<HelpAppLauncher> help_app_;
 
+  // Password for the current login attempt.
+  string16 password_;
+
   DISALLOW_COPY_AND_ASSIGN(ExistingUserController);
 };