Method isChromeEvent

lib/handler_stack.js:111–115

(event)

  // The handler stack handles chrome events (which may need to be suppressed) and internal (pseudo)
  // events. This checks whether the event at hand is a chrome event.
  isChromeEvent(event) {
    // TODO(philc): Shorten this.
    return ((event != null ? event.preventDefault : undefined) != null) ||
      ((event != null ? event.stopImmediatePropagation : undefined) != null);
  }

  // Convenience wrappers. Handlers must return an approriate value. These are wrappers which
  // handlers can use to always return the same value. This then means that the handler itself can