ChromeOS OOBE: More accessibility fixes.

chrome/browser/resources/chromeos/login/oobe_buttons.js

Index: chrome/browser/resources/chromeos/login/oobe_buttons.js
diff --git a/chrome/browser/resources/chromeos/login/oobe_buttons.js b/chrome/browser/resources/chromeos/login/oobe_buttons.js
index 53cf9f53fee089a988bb7a79220591393ee8addb..1fc41bbb7d8ce4741b5bae6caa73b53399fdfcda 100644
--- a/chrome/browser/resources/chromeos/login/oobe_buttons.js
+++ b/chrome/browser/resources/chromeos/login/oobe_buttons.js
@@ -10,7 +10,11 @@ Polymer({
 
     inverse: Boolean,
 
-    ariaLabel: String,
+    /* Note that we are not using "aria-label" property here, because
+     * we want to pass the label value but not actually declare it as an
+     * ARIA property anywhere but the actual target element.
+     */
+    labelForAria: String,
   },
 
   focus: function() {
@@ -29,7 +33,11 @@ Polymer({
   properties: {
     disabled: {type: Boolean, value: false, reflectToAttribute: true},
 
-    ariaLabel: String,
+    /* Note that we are not using "aria-label" property here, because
+     * we want to pass the label value but not actually declare it as an
+     * ARIA property anywhere but the actual target element.
+     */
+    labelForAria: String,
   },
 
   focus: function() {
@@ -65,7 +73,11 @@ Polymer({
   properties: {
     icon: String,
 
-    ariaLabel: String
+    /* Note that we are not using "aria-label" property here, because
+     * we want to pass the label value but not actually declare it as an
+     * ARIA property anywhere but the actual target element.
+     */
+    labelForAria: String
   },
 
   focus: function() {