问Google音译API在移动Chrome中不起作用

EN

<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
  // Load the Google Transliterate API
  google.load("elements", "1", {
    packages: "transliteration"
  });

  function onLoad() {
    var options = {
      sourceLanguage: 'en',
      destinationLanguage: ['gu'],
      transliterationEnabled: true
    };
    if (google.elements.transliteration.isBrowserCompatible()) {
      alert('compatible');
      var control = new google.elements.transliteration.TransliterationControl(options);
      var ids = ["idTitle", "idContent"];
      control.makeTransliteratable(ids);
    } else {
      alert('not compatible');
    }
  }
  google.setOnLoadCallback(onLoad);
</script>
<form action="index.php" method="post">
  <label for="blogtitle">Title</label>
  <input type="text" id="idTitle" name="txtTitle" value="" required>
  <label for="content">Content</label>
  <textarea id="idContent" name="txtContent" required> </textarea>
  <input name="btnAdd" type="submit" value="Add">
</form>