Make downloads list keyboard shortcuts more consistent.

chrome/browser/resources/history/other_devices.js

Index: chrome/browser/resources/history/other_devices.js
diff --git a/chrome/browser/resources/history/other_devices.js b/chrome/browser/resources/history/other_devices.js
index 33e4bd46f33ae04f6c3853b023a0732a187630db..b8becff69fa2e35bf5fcdfb5a8f65529f2ab7434 100644
--- a/chrome/browser/resources/history/other_devices.js
+++ b/chrome/browser/resources/history/other_devices.js
@@ -427,6 +427,27 @@ DevicesView.prototype.increaseRowHeight = function(row, height) {
 // DevicesView, Private -------------------------------------------------------
 
 /**
+ * Provides an implementation for a single column grid.
+ * @constructor
+ * @implements {cr.ui.FocusRow.Observer}
+ */
+DevicesView.SingleColumnObserver = function() {};
+
+DevicesView.SingleColumnObserver.prototype = {
+  /** @override */
+  onActivate: function(row) {},
+
+  /** @override */
+  onDeactivate: function(row) {},
+
+    /** @override */
+  getRowElement: function(rowItem) { return rowItem; },
+
+    /** @override */
+  onElementIdMiss: function(row, expectedId) { return null; },
+};
+
+/**
  * Update the page with results.
  * @private
  */
@@ -479,16 +500,19 @@ DevicesView.prototype.displayResults_ = function() {
   this.focusGrids_.forEach(function(grid) { grid.destroy(); });
   this.focusGrids_.length = 0;
 
-  var singleColumn = function(e) { return [e]; };
-
   var devices = this.resultDiv_.querySelectorAll('.device-contents');
   for (var i = 0; i < devices.length; ++i) {
     var rows = devices[i].querySelectorAll('.device-tab-entry, button');
     if (!rows.length)
       continue;
 
-    var grid = new cr.ui.FocusGrid(devices[i]);
-    grid.setGrid(Array.prototype.map.call(rows, singleColumn));
+    var grid = new cr.ui.FocusGrid(devices[i],
+                                   new DevicesView.SingleColumnObserver());
+    for (var j = 0; j < rows.length; ++j) {
+      var row = grid.createRow();
+      row.setFocusableElementId(rows[j], 'single-column');
+      grid.addRow(row);
+    }
     this.focusGrids_.push(grid);
   }
 };