This CL replaces e-mail with AccountId in easy signin code.

chrome/browser/chromeos/login/ui/webui_login_display.h

Index: chrome/browser/chromeos/login/ui/webui_login_display.h
diff --git a/chrome/browser/chromeos/login/ui/webui_login_display.h b/chrome/browser/chromeos/login/ui/webui_login_display.h
index 3dc8c90deff1e2c4d626085cbac3b24d00b298c4..f378fb3781ba0475aa51b77677c0e195ea72961c 100644
--- a/chrome/browser/chromeos/login/ui/webui_login_display.h
+++ b/chrome/browser/chromeos/login/ui/webui_login_display.h
@@ -81,7 +81,7 @@ class WebUILoginDisplay : public LoginDisplay,
 
   void HandleGetUsers() override;
   void CheckUserStatus(const AccountId& account_id) override;
-  bool IsUserWhitelisted(const std::string& user_id) override;
+  bool IsUserWhitelisted(const AccountId& account_id) override;
 
   // ui::UserActivityDetector implementation:
   void OnUserActivity(const ui::Event* event) override;
@@ -89,14 +89,14 @@ class WebUILoginDisplay : public LoginDisplay,
  private:
 
   // Whether to show guest login.
-  bool show_guest_;
+  bool show_guest_ = false;
 
   // Weather to show the user pods or a GAIA sign in.
   // Public sessions are always shown.
-  bool show_users_;
+  bool show_users_ = false;
 
   // Whether to show add new user.
-  bool show_new_user_;
+  bool show_new_user_ = false;
 
   // Reference to the WebUI handling layer for the login screen
   LoginDisplayWebUIHandler* webui_handler_;