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

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

Index: chrome/browser/resources/settings/device_page/device_page.html
diff --git a/chrome/browser/resources/settings/device_page/device_page.html b/chrome/browser/resources/settings/device_page/device_page.html
index 1665552a5c9213cb9f69f278d8234dfc6d653b63..9e7e6b591f38abc297eee35584501dad0d43de6d 100644
--- a/chrome/browser/resources/settings/device_page/device_page.html
+++ b/chrome/browser/resources/settings/device_page/device_page.html
@@ -26,29 +26,35 @@
           <div class="middle">
             [[getPointersTitle_(hasMouse_, hasTouchpad_)]]
           </div>
-          <button class="subpage-arrow" is="paper-icon-button-light"></button>
+          <button class="subpage-arrow" is="paper-icon-button-light"
+              aria-label="[[getPointersTitle_(hasMouse_,
+                                              hasTouchpad_)]]"></button>
         </div>
         <div id="keyboardRow" class="settings-box" on-tap="onKeyboardTap_"
             actionable>
           <div class="middle">$i18n{keyboardTitle}</div>
-          <button class="subpage-arrow" is="paper-icon-button-light"></button>
+          <button class="subpage-arrow" is="paper-icon-button-light"
+              aria-label="$i18n{keyboardTitle}"></button>
         </div>
         <template is="dom-if" if="[[hasStylus_]]">
           <div id="stylusRow" class="settings-box" on-tap="onStylusTap_"
               actionable>
             <div class="middle">$i18n{stylusTitle}</div>
-          <button class="subpage-arrow" is="paper-icon-button-light"></button>
+          <button class="subpage-arrow" is="paper-icon-button-light"
+              aria-label="$i18n{stylusTitle}"></button>
           </div>
         </template>
         <div id="displayRow" class="settings-box" on-tap="onDisplayTap_"
             actionable>
           <div class="middle">$i18n{displayTitle}</div>
-          <button class="subpage-arrow" is="paper-icon-button-light"></button>
+          <button class="subpage-arrow" is="paper-icon-button-light"
+              aria-label="$i18n{displayTitle}"></button>
         </div>
         <div id="storageRow" class="settings-box" on-tap="onStorageTap_"
             actionable>
           <div class="middle">$i18n{storageTitle}</div>
-          <button class="subpage-arrow" is="paper-icon-button-light"></button>
+          <button class="subpage-arrow" is="paper-icon-button-light"
+              aria-label="$i18n{storageTitle}"></button>
         </div>
         <template is="dom-if" if="[[enablePowerSettings_]]">
           <div id="powerRow" class="settings-box two-line">