Chrome OS: Unify keyboard focus highlighting of buttons in the list.

This Cl unifies buttons layout in the list, and thus makes keyboard focus
highliting look the same for all buttons.

Bug: 822889
Change-Id: Ic7c1795d72a0f07e5137731874fe4a53e70e729e
Reviewed-on: https://chromium-review.googlesource.com/1166294
Commit-Queue: Alexander Alekseev <alemate@chromium.org>
Reviewed-by: Wenzhao (Colin) Zang <wzang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581490}

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

@@ -155,9 +155,9 @@
       <div slot="footer" class="layout vertical">
         <paper-radio-group id="optionsGroup" selected="reviewOptions"
             on-paper-radio-group-changed="onOptionsSelectionChanged_">
-          <paper-radio-button name="reviewOptions" class="focus-on-show"
-              class="options-list-item flex layout horizontal center"
-              consent-option>
+          <paper-radio-button name="reviewOptions"
+              class="options-list-item flex layout horizontal center
+                  focus-on-show" consent-option>
             <div class="options-list-item-text flex layout vertical
                 center-justified">
                 <div class="sync-option-title" consent-description>