Improve accessibility of user image selection screen.

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

Index: chrome/browser/resources/chromeos/login/oobe_screen_user_image.js
diff --git a/chrome/browser/resources/chromeos/login/oobe_screen_user_image.js b/chrome/browser/resources/chromeos/login/oobe_screen_user_image.js
index cb782ee1c733a3ee9a3ee21d50f827c2a9955525..fed6a3aeb4777f77ae2cd875a072273828afdec9 100644
--- a/chrome/browser/resources/chromeos/login/oobe_screen_user_image.js
+++ b/chrome/browser/resources/chromeos/login/oobe_screen_user_image.js
@@ -69,7 +69,9 @@ cr.define('oobe', function() {
       // Profile image data (if present).
       this.profileImage_ = imageGrid.addItem(
           ButtonImages.PROFILE_PICTURE,
-          undefined, undefined, undefined,
+          localStrings.getString('profilePhoto'),
+          undefined,
+          undefined,
           function(el) {  // Custom decorator for Profile image element.
             var spinner = el.ownerDocument.createElement('div');
             spinner.className = 'spinner';
@@ -243,7 +245,7 @@ cr.define('oobe', function() {
       if (present && !this.takePhotoButton_) {
         this.takePhotoButton_ = imageGrid.addItem(
             ButtonImages.TAKE_PHOTO,
-            undefined,
+            localStrings.getString('takePhoto'),
             this.handleTakePhoto_.bind(this),
             0);
       } else if (!present && this.takePhotoButton_) {
@@ -285,13 +287,14 @@ cr.define('oobe', function() {
 
     /**
      * Appends received images to the list.
-     * @param {Array.<string>} images An array of URLs to user images.
+     * @param {Array.<Object>} imageInfos An array of data about user images.
      * @private
      */
-    setUserImages_: function(images) {
+    setUserImages_: function(imageInfos) {
       var imageGrid = $('user-image-grid');
-      for (var i = 0, url; url = images[i]; i++)
-        imageGrid.addItem(url);
+      for (var i = 0, imageInfo; imageInfo = imageInfos[i]; i++) {
+        imageGrid.addItem(imageInfo.url, imageInfo.title).type = 'default';
+      }
     },
 
     /**
@@ -532,13 +535,14 @@ cr.define('oobe', function() {
 
     /**
      * Appends received images to the list.
-     * @param {Array.<string>} images An array of URLs to user images.
+     * @param {Array.<Object>} imageInfos An array of data about user images.
      * @private
      */
-    setUserImages_: function(images) {
+    setUserImages_: function(imageInfos) {
       var imageGrid = $('user-image-grid');
-      for (var i = 0, url; url = images[i]; i++)
-        imageGrid.addItem(url).type = 'default';
+      for (var i = 0, imageInfo; imageInfo = imageInfos[i]; i++) {
+        imageGrid.addItem(imageInfo.url, imageInfo.title).type = 'default';
+      }
     },
 
     /**