MD Settings: fix some dynamically bound aria-labels

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

 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/md_select_css.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="device_page_browser_proxy.html">
 <link rel="import" href="display.html">
 <link rel="import" href="keyboard.html">
 <link rel="import" href="pointers.html">
 <link rel="import" href="storage.html">
 <link rel="import" href="stylus.html">
 <link rel="import" href="../prefs/prefs.html">
 <link rel="import" href="../route.html">
 <link rel="import" href="../settings_page/settings_animated_pages.html">
 <link rel="import" href="../settings_page/settings_subpage.html">
 <link rel="import" href="../settings_shared_css.html">
 
 <dom-module id="settings-device-page">
   <template>
     <style include="settings-shared md-select"></style>
     <settings-animated-pages id="pages" section="device">
       <neon-animatable id="main" route-path="default">
         <div id="pointersRow" class="settings-box first"
             on-tap="onPointersTap_" actionable>
           <div class="start">
             [[getPointersTitle_(hasMouse_, hasTouchpad_)]]
           </div>
           <button class="subpage-arrow" is="paper-icon-button-light"
-              aria-label="[[getPointersTitle_(hasMouse_,
+              aria-label$="[[getPointersTitle_(hasMouse_,
                   hasTouchpad_)]]"></button>
         </div>
         <div id="keyboardRow" class="settings-box" on-tap="onKeyboardTap_"
             actionable>
           <div class="start">$i18n{keyboardTitle}</div>
           <button class="subpage-arrow" is="paper-icon-button-light"
               aria-label="$i18n{keyboardTitle}"></button>
         </div>
         <template is="dom-if" if="[[hasStylus_]]">
           <div id="stylusRow" class="settings-box" on-tap="onStylusTap_"
@@ skipping 78 matching lines @@
         <settings-subpage
             associated-control="[[$$('#storageRow')]]"
             page-title="$i18n{storageTitle}">
           <settings-storage></settings-storage>
         </settings-subpage>
       </template>
     </settings-animated-pages>
   </template>
   <script src="device_page.js"></script>
 </dom-module>