Send 'key' from fake keyboard events generated by file_manager.

ui/file_manager/integration_tests/remote_call.js

Index: ui/file_manager/integration_tests/remote_call.js
diff --git a/ui/file_manager/integration_tests/remote_call.js b/ui/file_manager/integration_tests/remote_call.js
index 40efc898d3fe1830ccd56b0a51e6a12d1c62239e..aa014c6ed19bfe7f82349ea3569ae16c1944edea 100644
--- a/ui/file_manager/integration_tests/remote_call.js
+++ b/ui/file_manager/integration_tests/remote_call.js
@@ -201,6 +201,7 @@ RemoteCall.prototype.waitForElementLost =
  * Sends a fake key down event.
  * @param {string} windowId Window ID.
  * @param {string} query Query for the target element.
+ * @param {string} key DOM UI Events Key value.
  * @param {string} keyIdentifer Key identifier.
  * @param {boolean} ctrlKey Control key flag.
  * @param {boolean} shiftKey Shift key flag.
@@ -209,10 +210,10 @@ RemoteCall.prototype.waitForElementLost =
  *     result.
  */
 RemoteCall.prototype.fakeKeyDown =
-    function(windowId, query, keyIdentifer, ctrlKey, shiftKey, altKey) {
+    function(windowId, query, key, keyIdentifer, ctrlKey, shiftKey, altKey) {
   var resultPromise = this.callRemoteTestUtil(
       'fakeKeyDown', windowId,
-      [query, keyIdentifer, ctrlKey, shiftKey, altKey]);
+      [query, key, keyIdentifer, ctrlKey, shiftKey, altKey]);
   return resultPromise.then(function(result) {
     if (result)
       return true;
@@ -362,7 +363,7 @@ RemoteCallFilesApp.prototype.checkNextTabFocus =
     function(windowId, elementId) {
   return remoteCall.callRemoteTestUtil('fakeKeyDown',
                                        windowId,
-                                       ['body', 'U+0009', false]).then(
+                                       ['body', 'Tab', 'U+0009', false]).then(
   function(result) {
     chrome.test.assertTrue(result);
     return remoteCall.callRemoteTestUtil('getActiveElement',