Fix Security token PIN dialog css inclusion

Bug: 955194
Change-Id: I89d1fff0bd85ad9c3bd259a259d52bfc9962c40a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2066926
Auto-Submit: Denis Kuznetsov [CET] <antrim@chromium.org>
Commit-Queue: Denis Kuznetsov [CET] <antrim@chromium.org>
Commit-Queue: Maksim Ivanov <emaxx@chromium.org>
Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743591}

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

@@ -5,11 +5,10 @@
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 
 <dom-module id="security-token-pin">
-  <link rel="stylesheet" href="oobe_dialog_host.css">
-  <link rel="stylesheet" href="oobe_flex_layout.css">
-  <link rel="stylesheet" href="security_token_pin.css">
-
   <template>
+    <link rel="stylesheet" href="oobe_dialog_host.css">
+    <link rel="stylesheet" href="oobe_flex_layout.css">
+    <link rel="stylesheet" href="security_token_pin.css">
 
     <oobe-dialog class="gaia-dialog" has-buttons role="dialog"
         title-key="securityTokenPinDialogTitle"
@@ -49,6 +48,5 @@
             disabled="[[!canSubmit_]]"></oobe-next-button>
       </div>
     </oobe-dialog>
-
   </template>
 </dom-module>