HiDPI assets for Chrome OS Files app

chrome/browser/resources/file_manager/js/file_manager.js

Index: chrome/browser/resources/file_manager/js/file_manager.js
diff --git a/chrome/browser/resources/file_manager/js/file_manager.js b/chrome/browser/resources/file_manager/js/file_manager.js
index 96c0a2e03c0a31742a3032c587ec81b443f10bf3..1e0e1e2dd86317420a45b0fe95b48e519b4ae643 100644
--- a/chrome/browser/resources/file_manager/js/file_manager.js
+++ b/chrome/browser/resources/file_manager/js/file_manager.js
@@ -1827,7 +1827,7 @@ FileManager.prototype = {
   FileManager.prototype.renderIconType_ = function(entry, columnId, table) {
     var icon = this.document_.createElement('div');
     icon.className = 'detail-icon';
-    icon.setAttribute('iconType', FileType.getIcon(entry));
+    icon.setAttribute('file-type-icon', FileType.getIcon(entry));
     return icon;
   };
 
@@ -1873,9 +1873,10 @@ FileManager.prototype = {
     var div = this.document_.createElement('div');
     div.className = 'root-label';
 
-    div.setAttribute('type', rootType);
+    div.setAttribute('volume-type-icon', rootType);
     if (rootType === RootType.REMOVABLE)
-      div.setAttribute('subType', this.volumeManager_.getDeviceType(path));
+      div.setAttribute('volume-subtype',
+          this.volumeManager_.getDeviceType(path));
 
     div.textContent = this.getRootLabel_(path);
     li.appendChild(div);
@@ -1898,12 +1899,6 @@ FileManager.prototype = {
     cr.defineProperty(li, 'lead', cr.PropertyKind.BOOL_ATTR);
     cr.defineProperty(li, 'selected', cr.PropertyKind.BOOL_ATTR);
 
-    var icon = rootType;
-    if (this.volumeManager_.isUnreadable(path)) {
-      icon = 'unreadable';
-    }
-    div.setAttribute('icon', icon);
-
     return li;
   };
 
@@ -3170,12 +3165,12 @@ FileManager.prototype = {
 
     if (show) {
       var html = util.htmlUnescape(str('DOWNLOADS_DIRECTORY_WARNING'));
-      box.lastElementChild.innerHTML = html;
+      box.innerHTML = html;
       var link = box.querySelector('a');
       link.addEventListener('click',
           this.onExternalLinkClick_.bind(this, DOWNLOADS_FAQ_URL));
     } else {
-      box.lastElementChild.innerHTML = '';
+      box.innerHTML = '';
     }
 
     box.hidden = !show;