Fix div matching in cups_add_printer_dialog

div for the dialog-title slot was mismatched, resulting in a bug where
the error would not show.

Bug: 1011586
Change-Id: Id35c21c1a5ff6c2c60845cd1f736fe713e301c23
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1848479
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Auto-Submit: Bailey Berro <baileyberro@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704011}

chrome/browser/resources/settings/printing_page/cups_add_printer_dialog.html

@@ -78,7 +78,8 @@
   <template>
     <style include="cups-printer-shared"></style>
     <add-printer-dialog>
-      <div slot="dialog-title">$i18n{addPrintersManuallyTitle}</div>
+      <div slot="dialog-title">
+        $i18n{addPrintersManuallyTitle}
         <div id="general-error-container" hidden="[[!errorText_]]">
           <div id="general-error">
             <iron-icon id="general-error-icon" icon="cr:warning"></iron-icon>
@@ -87,6 +88,7 @@
             </div>
           </div>
         </div>
+      </div>
       <div slot="dialog-body">
         <div class="settings-box first two-line">
           <cr-input class="printer-name-input" autofocus