Error event was fired synchronously blowing away the input element from underneath. Remove the FIXME and fire it asynchronously using errorEventSender().

BUG=240124

Review URL: https://chromiumcodereview.appspot.com/14741011

git-svn-id: svn://svn.chromium.org/blink/trunk@150232 bbb929c8-8fbe-4397-9dbb-9b2b20218538
    static void checkConsistency(const WebCore::ImageLoader* p)
    {
        if (!p)
            return;
        ASSERT(p->element());
        ValueCheck<WebCore::Element*>::checkConsistency(p->element());
    }

    static void checkConsistency(const WebCore::ImageLoader* p)
    {
        if (!p)
            return;
        ASSERT(p->element());
        ValueCheck<WebCore::Element*>::checkConsistency(p->element());
    }
