Handle case in LMU creation when there are no managers available

BUG=229762
R=nkostylev@chromium.org

Review URL: https://chromiumcodereview.appspot.com/16091003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202475 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/chromeos_strings.grdp

@@ -435,6 +435,9 @@ Press any key to continue exploring.
   <message name="IDS_CREATE_LOCALLY_MANAGED_USER_FEATURE_NAME" desc="Title close to icon shown on side of Google sign-in UI to create a locally managed user.">
     Locally managed user
   </message>
+  <message name="IDS_CREATE_LOCALLY_MANAGED_USER_NO_MANAGER_TEXT" desc="Text shown when managed user can be created, but no users that can be manager exist.">
+    At least one account must exist on this device before creating a Limited user.
+  </message>
   <message name="IDS_CREATE_LOCALLY_MANAGED_USER_HTML" desc="Text with actual name shown on side of Google sign-in UI to create a locally managed user.">
     <ph name="LINK_START">$1<ex>&gt;a&lt;</ex></ph>Create managed user<ph name="LINK_END">$2<ex>&gt;/a&lt;</ex></ph> for this device.
   </message>

chrome/browser/resources/chromeos/login/screen_gaia_signin.html

@@ -22,6 +22,8 @@
           <span i18n-content="createManagedUserFeatureName"></span>
         </div>
         <div id="createManagedUserLinkPlaceholder"></div>
+        <div id="createManagedUserNoManagerText"
+            i18n-content="createManagedUserNoManagerText" hidden></div>
       </div>
     </div>
   </div>

chrome/browser/resources/chromeos/login/screen_gaia_signin.js

@@ -259,7 +259,12 @@ login.createScreen('GaiaSigninScreen', 'gaia-signin', function() {
 
       $('createAccount').hidden = !data.createAccount;
       $('guestSignin').hidden = !data.guestSignin;
-      $('createManagedUserPane').hidden = !data.createLocallyManagedUser;
+      $('createManagedUserPane').hidden = !data.managedUsersEnabled;
+
+      $('createManagedUserLinkPlaceholder').hidden =
+          !data.managedUsersCanCreate;
+      $('createManagedUserNoManagerText').hidden = data.managedUsersCanCreate;
+
       // Allow cancellation of screen only when user pods can be displayed.
       this.cancelAllowed_ = data.isShowUsers && $('pod-row').pods.length;
       $('login-header-bar').allowCancel = this.cancelAllowed_;

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc

@@ -178,16 +178,6 @@ void UpdateAuthParamsFromSettings(DictionaryValue* params,
   // Account creation depends on Guest sign-in (http://crosbug.com/24570).
   params->SetBoolean("createAccount", allow_new_user && allow_guest);
   params->SetBoolean("guestSignin", allow_guest);
-  // TODO(nkostylev): Allow locally managed user creation only if:
-  // 1. Enterprise managed device > is allowed by policy.
-  // 2. Consumer device > owner exists.
-  // g_browser_process->browser_policy_connector()->IsEnterpriseManaged()
-  // const UserList& users = delegate_->GetUsers();
-  // bool single_user = users.size() == 1;
-  // chromeos::CrosSettings::Get()->GetString(chromeos::kDeviceOwner, &owner);
-  const CommandLine* command_line = CommandLine::ForCurrentProcess();
-  params->SetBoolean("createLocallyManagedUser",
-                     command_line->HasSwitch(::switches::kEnableManagedUsers));
 }
 
 bool IsOnline(NetworkStateInformer::State state,
@@ -400,6 +390,8 @@ void SigninScreenHandler::DeclareLocalizedValues(
                IDS_CREATE_LOCALLY_MANAGED_USER_HTML);
   builder->Add("createManagedUserFeatureName",
                IDS_CREATE_LOCALLY_MANAGED_USER_FEATURE_NAME);
+  builder->Add("createManagedUserNoManagerText",
+               IDS_CREATE_LOCALLY_MANAGED_USER_NO_MANAGER_TEXT);
   builder->Add("offlineLogin", IDS_OFFLINE_LOGIN_HTML);
   builder->Add("ownerUserPattern", IDS_LOGIN_POD_OWNER_USER);
   builder->Add("removeUser", IDS_LOGIN_POD_REMOVE_USER);
@@ -995,6 +987,28 @@ void SigninScreenHandler::ShowSigninScreenIfReady() {
               ErrorScreenActor::ERROR_REASON_UPDATE);
 }
 
+
+void SigninScreenHandler::UpdateAuthParams(DictionaryValue* params) {
+  UpdateAuthParamsFromSettings(params, CrosSettings::Get());
+
+  // TODO(nkostylev): Allow locally managed user creation only if:
+  // 1. Enterprise managed device > is allowed by policy.
+  // 2. Consumer device > owner exists.
+  // g_browser_process->browser_policy_connector()->IsEnterpriseManaged()
+  // const UserList& users = delegate_->GetUsers();
+  // bool single_user = users.size() == 1;
+  // chromeos::CrosSettings::Get()->GetString(chromeos::kDeviceOwner, &owner);
+
+  const CommandLine* command_line = CommandLine::ForCurrentProcess();
+  bool managed_users_enabled =
+      command_line->HasSwitch(::switches::kEnableManagedUsers);
+  bool managed_users_can_create = false;
+  if (managed_users_enabled)
+    managed_users_can_create = delegate_->GetUsers().size() > 0;
+  params->SetBoolean("managedUsersEnabled", managed_users_enabled);
+  params->SetBoolean("managedUsersCanCreate", managed_users_can_create);
+}
+
 void SigninScreenHandler::LoadAuthExtension(
     bool force, bool silent_load, bool offline) {
   DictionaryValue params;
@@ -1010,7 +1024,7 @@ void SigninScreenHandler::LoadAuthExtension(
   params.SetString("email", email_);
   email_.clear();
 
-  UpdateAuthParamsFromSettings(&params, CrosSettings::Get());
+  UpdateAuthParams(&params);
 
   if (!offline) {
     const std::string app_locale = g_browser_process->GetApplicationLocale();
@@ -1055,7 +1069,7 @@ void SigninScreenHandler::LoadAuthExtension(
 
 void SigninScreenHandler::UpdateAuthExtension() {
   DictionaryValue params;
-  UpdateAuthParamsFromSettings(&params, CrosSettings::Get());
+  UpdateAuthParams(&params);
   CallJS("login.GaiaSigninScreen.updateAuthExtension", params);
 }
 

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h

@@ -271,6 +271,9 @@ class SigninScreenHandler
   void UpdateAuthExtension();
   void UpdateAddButtonStatus();
 
+  // Fill |params| that are passed to JS..
+  void UpdateAuthParams(DictionaryValue* params);
+
   // Restore input focus to current user pod.
   void RefocusCurrentPod();