WebUIHandler for chrome://keyboard

ui/keyboard/resources/send_key_event.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.
+
+function logIfError() {
+  if (chrome.runtime.lastError) {
+    console.log(chrome.runtime.lastError);
+  }
+}
+
+function sendKeyEvent(keyEvent) {
+  keyEvent.type = 'keydown';
+  chrome.experimental.input.virtualKeyboard.sendKeyboardEvent(keyEvent,
+      logIfError);
+  keyEvent.type = 'keyup';
+  chrome.experimental.input.virtualKeyboard.sendKeyboardEvent(keyEvent,
+      logIfError);
+}