[MD Bookmarks] Add keyboard navigation and selection to bookmark list.

chrome/browser/resources/md_bookmarks/actions.js

Index: chrome/browser/resources/md_bookmarks/actions.js
diff --git a/chrome/browser/resources/md_bookmarks/actions.js b/chrome/browser/resources/md_bookmarks/actions.js
index 6fb4ae621fdca9a634911c0ff222fd9caa9c8225..6281bc064453e2078a8bf705e805bc4a038d0846 100644
--- a/chrome/browser/resources/md_bookmarks/actions.js
+++ b/chrome/browser/resources/md_bookmarks/actions.js
@@ -191,6 +191,32 @@ cr.define('bookmarks.actions', function() {
   }
 
   /**
+   * @param {Array<string>} ids
+   * @param {BookmarksPageState} state
+   * @return {!Action}
+   */
+  function selectAll(ids, state) {
+    return {
+      name: 'select-items',
+      clear: true,
+      toggle: false,
+      anchor: state.selection.anchor,
+      items: ids,
+    };
+  }
+
+  /**
+   * @param {string} id
+   * @return {!Action}
+   */
+  function updateAnchor(id) {
+    return {
+      name: 'update-anchor',
+      anchor: id,
+    };
+  }
+
+  /**
    * @param {string} term
    * @return {!Action}
    */
@@ -225,9 +251,11 @@ cr.define('bookmarks.actions', function() {
     refreshNodes: refreshNodes,
     removeBookmark: removeBookmark,
     reorderChildren: reorderChildren,
+    selectAll: selectAll,
     selectFolder: selectFolder,
     selectItem: selectItem,
     setSearchResults: setSearchResults,
     setSearchTerm: setSearchTerm,
+    updateAnchor: updateAnchor,
   };
 });