cros: HTML fixes needed to reinitializing an existing lock WebUI.

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 251 matching lines @@
   if (token_status == user_manager::User::OAUTH2_TOKEN_STATUS_INVALID)
     RecordReauthReason(user->GetAccountId(), ReauthReason::OTHER);
 
   return user->force_online_signin() ||
          (token_status == user_manager::User::OAUTH2_TOKEN_STATUS_INVALID) ||
          (token_status == user_manager::User::OAUTH_TOKEN_STATUS_UNKNOWN);
 }
 
 void UserSelectionScreen::SetHandler(LoginDisplayWebUIHandler* handler) {
   handler_ = handler;
+
+  if (handler_) {
+    // Forcibly refresh all of the user images, as the handler_  instance may

[xiyuan, 2016/12/09 22:47:21]

nit: handler_ -> |handler_| and remove one extra space after it

[jdufault, 2016/12/12 19:52:02]

Done.

+    // have been reused.
+    for (user_manager::User* user : users_)
+      handler_->OnUserImageChanged(*user);
+  }
 }
 
 void UserSelectionScreen::SetView(UserBoardView* view) {
   view_ = view;
 }
 
 void UserSelectionScreen::Init(const user_manager::UserList& users,
                                bool show_guest) {
   users_ = users;
   show_guest_ = show_guest;
@@ skipping 286 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