This CL replaces user_manager::UserID with AccountId.

chrome/browser/chromeos/login/users/fake_chrome_user_manager.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/login/users/fake_chrome_user_manager.h"
 
 #include "chrome/browser/chromeos/login/users/chrome_user_manager.h"
 #include "chrome/browser/chromeos/login/users/fake_supervised_user_manager.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/grit/theme_resources.h"
 #include "components/user_manager/user_image/user_image.h"
 #include "components/user_manager/user_type.h"
 #include "ui/base/resource/resource_bundle.h"
 
 namespace chromeos {
 
 class FakeSupervisedUserManager;
 
 FakeChromeUserManager::FakeChromeUserManager()
     : supervised_user_manager_(new FakeSupervisedUserManager),
+      owner_id_(EmptyAccountId()),

[achuithb, 2015/10/23 00:08:51]

in class member initialization

[Alexander Alekseev, 2015/10/23 09:11:22]

Done.

       bootstrap_manager_(NULL),
-      multi_profile_user_controller_(NULL) {
-}
+      multi_profile_user_controller_(NULL) {}
 
 FakeChromeUserManager::~FakeChromeUserManager() {
 }
 
 const user_manager::User* FakeChromeUserManager::AddUser(
-    const std::string& email) {
-  return AddUserWithAffiliation(email, false);
+    const AccountId& account) {

[achuithb, 2015/10/23 00:08:51]

account_id? here and below

[Alexander Alekseev, 2015/10/23 09:11:22]

Done.

+  return AddUserWithAffiliation(account, false);
 }
 
 const user_manager::User* FakeChromeUserManager::AddUserWithAffiliation(
-    const std::string& email,
+    const AccountId& account,
     bool is_affiliated) {
-  user_manager::User* user = user_manager::User::CreateRegularUser(email);
+  user_manager::User* user = user_manager::User::CreateRegularUser(account);
   user->set_affiliation(is_affiliated);
   user->set_username_hash(
-      ProfileHelper::GetUserIdHashByUserIdForTesting(email));
+      ProfileHelper::GetUserIdHashByUserIdForTesting(account.GetUserEmail()));
   user->SetStubImage(user_manager::UserImage(
                          *ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
                              IDR_PROFILE_PICTURE_LOADING)),
                      user_manager::User::USER_IMAGE_PROFILE, false);
   users_.push_back(user);
   return user;
 }
 
 const user_manager::User* FakeChromeUserManager::AddPublicAccountUser(
-    const std::string& email) {
-  user_manager::User* user = user_manager::User::CreatePublicAccountUser(email);
+    const AccountId& account) {
+  user_manager::User* user =
+      user_manager::User::CreatePublicAccountUser(account);
   user->set_username_hash(
-      ProfileHelper::GetUserIdHashByUserIdForTesting(email));
+      ProfileHelper::GetUserIdHashByUserIdForTesting(account.GetUserEmail()));
   user->SetStubImage(user_manager::UserImage(
                          *ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
                              IDR_PROFILE_PICTURE_LOADING)),
                      user_manager::User::USER_IMAGE_PROFILE, false);
   users_.push_back(user);
   return user;
 }
 
 void FakeChromeUserManager::AddKioskAppUser(
-    const std::string& kiosk_app_username) {
+    const AccountId& kiosk_app_user_id) {
   user_manager::User* user =
-      user_manager::User::CreateKioskAppUser(kiosk_app_username);
-  user->set_username_hash(
-      ProfileHelper::GetUserIdHashByUserIdForTesting(kiosk_app_username));
+      user_manager::User::CreateKioskAppUser(kiosk_app_user_id);
+  user->set_username_hash(ProfileHelper::GetUserIdHashByUserIdForTesting(
+      kiosk_app_user_id.GetUserEmail()));
   users_.push_back(user);
 }
 
-void FakeChromeUserManager::LoginUser(const std::string& email) {
-  UserLoggedIn(email, ProfileHelper::GetUserIdHashByUserIdForTesting(email),
+void FakeChromeUserManager::LoginUser(const AccountId& account) {
+  UserLoggedIn(account, ProfileHelper::GetUserIdHashByUserIdForTesting(
+                            account.GetUserEmail()),
                false /* browser_restart */);
 }
 
 BootstrapManager* FakeChromeUserManager::GetBootstrapManager() {
   return bootstrap_manager_;
 }
 
 MultiProfileUserController*
 FakeChromeUserManager::GetMultiProfileUserController() {
   return multi_profile_user_controller_;
 }
 
 SupervisedUserManager* FakeChromeUserManager::GetSupervisedUserManager() {
   return supervised_user_manager_.get();
 }
 
 UserImageManager* FakeChromeUserManager::GetUserImageManager(
-    const std::string& /* user_id */) {
+    const AccountId& /* user_id */) {

[achuithb, 2015/10/23 00:08:51]

account_id

[Alexander Alekseev, 2015/10/23 09:11:22]

Done.

   return nullptr;
 }
 
-void FakeChromeUserManager::SetUserFlow(const std::string& email,
+void FakeChromeUserManager::SetUserFlow(const AccountId& account,
                                         UserFlow* flow) {
-  ResetUserFlow(email);
-  specific_flows_[email] = flow;
+  ResetUserFlow(account);
+  specific_flows_[account] = flow;
 }
 
 UserFlow* FakeChromeUserManager::GetCurrentUserFlow() const {
   if (!IsUserLoggedIn())
     return GetDefaultUserFlow();
-  return GetUserFlow(GetLoggedInUser()->email());
+  return GetUserFlow(GetLoggedInUser()->GetUserID());
 }
 
-UserFlow* FakeChromeUserManager::GetUserFlow(const std::string& email) const {
-  FlowMap::const_iterator it = specific_flows_.find(email);
+UserFlow* FakeChromeUserManager::GetUserFlow(const AccountId& account) const {
+  FlowMap::const_iterator it = specific_flows_.find(account);
   if (it != specific_flows_.end())
     return it->second;
   return GetDefaultUserFlow();
 }
 
-void FakeChromeUserManager::ResetUserFlow(const std::string& email) {
-  FlowMap::iterator it = specific_flows_.find(email);
+void FakeChromeUserManager::ResetUserFlow(const AccountId& account) {
+  FlowMap::iterator it = specific_flows_.find(account);
   if (it != specific_flows_.end()) {
     delete it->second;
     specific_flows_.erase(it);
   }
 }
 
-void FakeChromeUserManager::SwitchActiveUser(const std::string& email) {
-  active_user_id_ = email;
+void FakeChromeUserManager::SwitchActiveUser(const AccountId& account) {
+  active_user_id_ = account;
   ProfileHelper::Get()->ActiveUserHashChanged(
-      ProfileHelper::GetUserIdHashByUserIdForTesting(email));
+      ProfileHelper::GetUserIdHashByUserIdForTesting(account.GetUserEmail()));
   if (!users_.empty() && !active_user_id_.empty()) {
     for (user_manager::User* user : users_)
-      user->set_is_active(user->email() == active_user_id_);
+      user->set_is_active(user->GetUserID() == active_user_id_);
   }
 }
 
-const std::string& FakeChromeUserManager::GetOwnerEmail() const {
-  return owner_email_;
+const AccountId& FakeChromeUserManager::GetOwnerId() const {
+  return owner_id_;
 }
 
 void FakeChromeUserManager::SessionStarted() {
 }
 
 void FakeChromeUserManager::RemoveUser(
-    const std::string& email,
-    user_manager::RemoveUserDelegate* delegate) {
-}
+    const AccountId& account,
+    user_manager::RemoveUserDelegate* delegate) {}
 
 user_manager::UserList
 FakeChromeUserManager::GetUsersAllowedForSupervisedUsersCreation() const {
   CrosSettings* cros_settings = CrosSettings::Get();
   bool allow_new_user = true;
   cros_settings->GetBoolean(kAccountsPrefAllowNewUser, &allow_new_user);
   bool supervised_users_allowed = AreSupervisedUsersAllowed();
 
   // Restricted either by policy or by owner.
   if (!allow_new_user || !supervised_users_allowed)
@@ skipping 22 matching lines @@
   return result;
 }
 
 UserFlow* FakeChromeUserManager::GetDefaultUserFlow() const {
   if (!default_flow_.get())
     default_flow_.reset(new DefaultUserFlow());
   return default_flow_.get();
 }
 
 bool FakeChromeUserManager::FindKnownUserPrefs(
-    const user_manager::UserID& user_id,
+    const AccountId& user_id,
     const base::DictionaryValue** out_value) {
   return false;
 }
 
 void FakeChromeUserManager::UpdateKnownUserPrefs(
-    const user_manager::UserID& user_id,
+    const AccountId& user_id,
     const base::DictionaryValue& values,
-    bool clear) {
-}
+    bool clear) {}
 
 }  // namespace chromeos