Adding mojo calls for easy unlock service

chrome/browser/chromeos/login/screens/user_selection_screen.cc

 // Copyright 2014 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/screens/user_selection_screen.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 10 matching lines @@
 #include "chrome/browser/chromeos/login/quick_unlock/quick_unlock_factory.h"
 #include "chrome/browser/chromeos/login/quick_unlock/quick_unlock_storage.h"
 #include "chrome/browser/chromeos/login/reauth_stats.h"
 #include "chrome/browser/chromeos/login/ui/login_display_host.h"
 #include "chrome/browser/chromeos/login/ui/views/user_board_view.h"
 #include "chrome/browser/chromeos/login/users/chrome_user_manager.h"
 #include "chrome/browser/chromeos/login/users/multi_profile_user_controller.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/signin/easy_unlock_service.h"
+#include "chrome/browser/ui/ash/lock_screen_client.h"
 #include "chrome/browser/ui/webui/chromeos/login/l10n_util.h"
 #include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
 #include "chrome/grit/generated_resources.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/cryptohome/cryptohome_parameters.h"
 #include "chromeos/dbus/cryptohome_client.h"
 #include "chromeos/dbus/dbus_method_call_status.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "components/arc/arc_util.h"
 #include "components/prefs/pref_service.h"
@@ skipping 492 matching lines @@
     // Single user check here is necessary because owner info might not be
     // available when running into login screen on first boot.
     // See http://crosbug.com/12723
     bool can_remove_user =
         ((!single_user || is_enterprise_managed) && account_id.is_valid() &&
          !is_owner && !is_public_account && !signed_in && !is_signin_to_add);
     user_dict->SetBoolean(kKeyCanRemove, can_remove_user);
     users_list.Append(std::move(user_dict));
   }
 
-  handler_->LoadUsers(users_list, show_guest_);
+  if (handler_) {
+    handler_->LoadUsers(users_list, show_guest_);
+  } else {
+    // Views-based lock screen won't instantiate handler.
+    LockScreenClient::Get()->LoadUsers(users_list, show_guest_);

[jdufault, 2017/05/31 22:54:00]

FYI, https://codereview.chromium.org/2811383002/. Might make the mojom interface
a bit simpler since it won't be proxying through a dict.

[xiaoyinh(OOO Sep 11-29), 2017/06/02 23:42:29]

Thanks for the information.

+  }
 }
 
 void UserSelectionScreen::HandleGetUsers() {
   SendUserList();
 }
 
 void UserSelectionScreen::CheckUserStatus(const AccountId& account_id) {
   // No checks on lock screen.
   if (ScreenLocker::default_screen_locker())
     return;
@@ skipping 95 matching lines @@
 void UserSelectionScreen::AttemptEasySignin(const AccountId& account_id,
                                             const std::string& secret,
                                             const std::string& key_label) {
   DCHECK_EQ(GetScreenType(), SIGNIN_SCREEN);
 
   UserContext user_context(account_id);
   user_context.SetAuthFlow(UserContext::AUTH_FLOW_EASY_UNLOCK);
   user_context.SetKey(Key(secret));
   user_context.GetKey()->SetLabel(key_label);
 
-  login_display_delegate_->Login(user_context, SigninSpecifics());
+  // login display delegate not exist in views-based lock screen.
+  if (login_display_delegate_)
+    login_display_delegate_->Login(user_context, SigninSpecifics());
 }
 
 void UserSelectionScreen::Show() {}
 
 void UserSelectionScreen::Hide() {}
 
 void UserSelectionScreen::HardLockPod(const AccountId& account_id) {
   view_->SetAuthType(account_id, OFFLINE_PASSWORD, base::string16());
   EasyUnlockService* service = GetEasyUnlockServiceForUser(account_id);
   if (!service)
@@ skipping 36 matching lines @@
   // The user profile should exist if and only if this is the lock screen.
   DCHECK_EQ(!!profile, GetScreenType() == LOCK_SCREEN);
 
   if (!profile)
     profile = profile_helper->GetSigninProfile();
 
   return EasyUnlockService::Get(profile);
 }
 
 }  // namespace chromeos