Compile chrome://settings, part 6

chrome/browser/resources/chromeos/keyboard/keyboard_utils.js

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * Namespace for keyboard utility functions.
  */
 var keyboard = {};
 
 /**
  * Swallows keypress and keyup events of arrow keys.
- * @param {KeyboardEvent} event Raised event.
+ * @param {Event} event Raised event.
  * @private
  */
 keyboard.onKeyIgnore_ = function(event) {
+  event = /** @type {KeyboardEvent} */(event);
+
   if (event.ctrlKey || event.shiftKey || event.altKey || event.metaKey)
     return;
 
   if (event.keyIdentifier == 'Left' ||
       event.keyIdentifier == 'Right' ||
       event.keyIdentifier == 'Up' ||
       event.keyIdentifier == 'Down') {
     event.stopPropagation();
     event.preventDefault();
   }
 };
 
 /**
  * Converts arrow keys into tab/shift-tab key events.
- * @param {KeyboardEvent} event Raised event.
+ * @param {Event} event Raised event.
  * @private
  */
 keyboard.onKeyDown_ = function(event) {
-   if (event.ctrlKey || event.shiftKey || event.altKey || event.metaKey)
-     return;
+  event = /** @type {KeyboardEvent} */(event);
 
-   var needsUpDownKeys = event.target.classList.contains('needs-up-down-keys');
+  if (event.ctrlKey || event.shiftKey || event.altKey || event.metaKey)
+    return;
 
-   if (event.keyIdentifier == 'Left' ||
-       (!needsUpDownKeys && event.keyIdentifier == 'Up')) {
-     keyboard.raiseKeyFocusPrevious(document.activeElement);
-     event.stopPropagation();
-     event.preventDefault();
-   } else if (event.keyIdentifier == 'Right' ||
-              (!needsUpDownKeys && event.keyIdentifier == 'Down')) {
-     keyboard.raiseKeyFocusNext(document.activeElement);
-     event.stopPropagation();
-     event.preventDefault();
-   }
+  var needsUpDownKeys = event.target.classList.contains('needs-up-down-keys');
+
+  if (event.keyIdentifier == 'Left' ||
+      (!needsUpDownKeys && event.keyIdentifier == 'Up')) {
+    keyboard.raiseKeyFocusPrevious(document.activeElement);
+    event.stopPropagation();
+    event.preventDefault();
+  } else if (event.keyIdentifier == 'Right' ||
+             (!needsUpDownKeys && event.keyIdentifier == 'Down')) {
+    keyboard.raiseKeyFocusNext(document.activeElement);
+    event.stopPropagation();
+    event.preventDefault();
+  }
 };
 
 /**
  * Raises tab/shift-tab keyboard events.
  * @param {HTMLElement} element Element that should receive the event.
  * @param {string} eventType Keyboard event type.
  * @param {boolean} shift True if shift should be on.
  * @private
  */
 keyboard.raiseTabKeyEvent_ = function(element, eventType, shift) {
@@ skipping 36 matching lines @@
  * Initializes event handling for arrow keys driven focus flow.
  */
 keyboard.initializeKeyboardFlow = function() {
   document.addEventListener('keydown',
       keyboard.onKeyDown_, true);
   document.addEventListener('keypress',
       keyboard.onKeyIgnore_, true);
   document.addEventListener('keyup',
       keyboard.onKeyIgnore_, true);
 };