MD-Settings: A11y - Label power source and stylus drop downs.

chrome/browser/resources/settings/device_page/stylus.html

Index: chrome/browser/resources/settings/device_page/stylus.html
diff --git a/chrome/browser/resources/settings/device_page/stylus.html b/chrome/browser/resources/settings/device_page/stylus.html
index d39715de191c2661364b19b191f929f1ac9614c3..155822fc31693cc7a69982afa528aab66193c7b8 100644
--- a/chrome/browser/resources/settings/device_page/stylus.html
+++ b/chrome/browser/resources/settings/device_page/stylus.html
@@ -40,7 +40,9 @@
     </div>
 
     <div class="settings-box">
-      <div class="start">$i18n{stylusNoteTakingApp}</div>
+      <div id="stylusNoteTakingAppLabel" class="start">
+        $i18n{stylusNoteTakingApp}
+      </div>
 
       <div id="no-apps" class="secondary"
           hidden$="[[!showNoApps_(appChoices_, waitingForAndroid_)]]">
@@ -54,7 +56,8 @@
 
       <div id="select-app" class="md-select-wrapper"
           hidden$="[[!showApps_(appChoices_, waitingForAndroid_)]]">
-        <select id="menu" class="md-select" on-change="onSelectedAppChanged_">
+        <select id="menu" class="md-select" on-change="onSelectedAppChanged_"
+            aria-labelledby="stylusNoteTakingAppLabel">
           <template is="dom-repeat" items="[[appChoices_]]">
             <option value="[[item.value]]" selected="[[item.preferred]]">
               [[item.name]]