Use FireWebUIListener in InlineLoginHandlerImpl

Call FireWebUIListener instead of CallJavascriptFunction in
InlineLoginHandlerImpl. It will allow to get notification about the
event using cr.addWebUIListener instead of directly exporting the
function.

Bug: 1096007
Change-Id: Ib36630b1d618e1eec948d2f733e38bbe120c2c44
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2252144Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Kush Sinha <sinhak@chromium.org>
Commit-Queue: Anastasiia N <anastasiian@chromium.org>
Cr-Commit-Position: refs/heads/master@{#788666}

chrome/browser/resources/inline_login/inline_login.js

@@ -69,6 +69,7 @@ cr.define('inline.login', function() {
     cr.addWebUIListener('show-back-button', showBackButton);
     cr.addWebUIListener('load-auth-extension', loadAuthExtension);
     cr.addWebUIListener('close-dialog', closeDialog);
+    cr.addWebUIListener('send-lst-fetch-results', sendLSTFetchResults);
 
     authExtHost = new cr.login.Authenticator('signin-frame');
     authExtHost.addEventListener('dropLink', onDropLink);
@@ -155,7 +156,6 @@ cr.define('inline.login', function() {
 
   return {
     closeDialog: closeDialog,
-    sendLSTFetchResults: sendLSTFetchResults,
     getAuthExtHost: getAuthExtHost,
     handleOAuth2TokenFailure: handleOAuth2TokenFailure,
     initialize: initialize,

chrome/browser/ui/webui/signin/inline_login_handler_impl.cc

@@ -819,7 +819,7 @@ void InlineLoginHandlerImpl::HandleLoginError(const std::string& error_msg,
 void InlineLoginHandlerImpl::SendLSTFetchResultsMessage(
     const base::Value& arg) {
   if (IsJavascriptAllowed())
-    CallJavascriptFunction("inline.login.sendLSTFetchResults", arg);
+    FireWebUIListener("send-lst-fetch-results", arg);
 }
 
 Browser* InlineLoginHandlerImpl::GetDesktopBrowser() {