Put Kiosk App parameters into device settings.

chrome/browser/chromeos/login/user_manager.cc

Index: chrome/browser/chromeos/login/user_manager.cc
diff --git a/chrome/browser/chromeos/login/user_manager.cc b/chrome/browser/chromeos/login/user_manager.cc
index b9f82e7302dddf7053eba3cdff23efbab0a07d2d..3ced758d212cc56831791b5b0651e48819963f9a 100644
--- a/chrome/browser/chromeos/login/user_manager.cc
+++ b/chrome/browser/chromeos/login/user_manager.cc
@@ -5,7 +5,9 @@
 #include "chrome/browser/chromeos/login/user_manager.h"
 
 #include "base/logging.h"
+#include "base/string_util.h"
 #include "chrome/browser/chromeos/login/user_manager_impl.h"
+#include "chrome/common/extensions/extension.h"
 
 namespace chromeos {
 
@@ -54,6 +56,28 @@ UserManager* UserManager::SetForTesting(UserManager* user_manager) {
   return previous_user_manager;
 }
 
+// static
+bool UserManager::ParseKioskAppUserId(const std::string& user_id,
+                                      std::string* app_id) {
+  const std::string suffix(std::string("@") + kKioskAppUserDomain);
+  if (EndsWith(user_id, suffix, false)) {
+    const std::string candidate_app_id(
+        user_id.substr(0, user_id.size() - suffix.size()));
+    if (extensions::Extension::IdIsValid(candidate_app_id)) {
+      *app_id = candidate_app_id;
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// static
+std::string UserManager::FormatKioskAppUserId(const std::string& app_id) {
+  DCHECK(extensions::Extension::IdIsValid(app_id));
+  return app_id + '@' + kKioskAppUserDomain;
+}
+
 ScopedUserManagerEnabler::ScopedUserManagerEnabler(UserManager* user_manager)
     : previous_user_manager_(UserManager::SetForTesting(user_manager)) {
 }