MD Settings: label and describe a bunch of subpage/open-in-new buttons

chrome/browser/resources/settings/reset_page/reset_page.html

Index: chrome/browser/resources/settings/reset_page/reset_page.html
diff --git a/chrome/browser/resources/settings/reset_page/reset_page.html b/chrome/browser/resources/settings/reset_page/reset_page.html
index d2420594d93313a5371e4a051a182e5a23ecdb69..ce27e28e009fbe5c46148be394c9de0ae44e1b26 100644
--- a/chrome/browser/resources/settings/reset_page/reset_page.html
+++ b/chrome/browser/resources/settings/reset_page/reset_page.html
@@ -16,10 +16,14 @@
     <div class="settings-box first two-line" id="resetProfile"
         on-tap="onShowResetProfileDialog_" actionable>
       <div class="start">
-        <div>$i18n{resetPageTitle}</div>
-        <div class="secondary">$i18n{resetPageDescription}</div>
+        $i18n{resetPageTitle}
+        <div class="secondary" id="resetProfileSecondary">
+          $i18n{resetPageDescription}
+        </div>
       </div>
-      <button class="subpage-arrow" is="paper-icon-button-light"></button>
+      <button class="subpage-arrow" is="paper-icon-button-light"
+          aria-label="$i18n{resetPageTitle}"
+          aria-describedby="resetProfileSecondary"></button>
     </div>
     <template is="dom-if" if="[[showResetProfileDialog_]]" restamp>
       <settings-reset-profile-dialog on-close="onResetProfileDialogClose_">
@@ -29,10 +33,14 @@
     <div class="settings-box two-line" id="powerwash" actionable
         on-tap="onShowPowerwashDialog_" hidden="[[!allowPowerwash_]]">
       <div class="start">
-        <div>$i18n{powerwashTitle}</div>
-        <div class="secondary">$i18n{powerwashDescription}</div>
+        $i18n{powerwashTitle}
+        <div class="secondary" id="powerwashSecondary">
+          $i18n{powerwashDescription}
+        </div>
       </div>
-      <button class="subpage-arrow" is="paper-icon-button-light"></button>
+      <button class="subpage-arrow" is="paper-icon-button-light"
+          aria-label="$i18n{powerwashTitle}"
+          aria-describedby="powerwashSecondary"></button>
     </div>
     <template is="dom-if" if="[[showPowerwashDialog_]]" restamp>
       <settings-powerwash-dialog on-close="onPowerwashDialogClose_">