MD Bookmarks: Initial screenreader accessibility improvements

chrome/browser/resources/md_bookmarks/command_manager.html

Index: chrome/browser/resources/md_bookmarks/command_manager.html
diff --git a/chrome/browser/resources/md_bookmarks/command_manager.html b/chrome/browser/resources/md_bookmarks/command_manager.html
index 49cd2a9cbb5419ef93a2906c69c64befdfa9b049..2586135e6b9716471e27d048b450289f1e3d35ce 100644
--- a/chrome/browser/resources/md_bookmarks/command_manager.html
+++ b/chrome/browser/resources/md_bookmarks/command_manager.html
@@ -28,13 +28,14 @@
       }
     </style>
     <template is="cr-lazy-render" id="dropdown">
-      <dialog is="cr-action-menu" on-mousedown="onMenuMousedown_">
+      <dialog is="cr-action-menu" on-mousedown="onMenuMousedown_" role="menu">
         <template is="dom-repeat" items="[[menuCommands_]]" as="command">
           <button class="dropdown-item"
               command$="[[command]]"
               hidden$="[[!isCommandVisible_(command, menuIds_)]]"
               disabled$="[[!isCommandEnabled_(command, menuIds_)]]"
-              on-click="onCommandClick_">
+              on-click="onCommandClick_"
+              role="menuitem">
             <span class="label">
               [[getCommandLabel_(command, menuIds_)]]
             </span>