internal class WebPage: DependencyObject
{
    ....

    //The main tab controls
    private EO.Wpf.TabControl m_TabControl;

    ....
    
    //Pass the TabControl to the WebPage
    public WebPage(EO.WebBrowser.WebView webView, EO.Wpf.TabControl tabControl)
    {
        ....

        m_TabControl = tabControl;
    }

    //For the header to run layout again
    private void RelayoutTabHeaders()
    {
        UIElement header = m_TabControl.HeaderElement;
        if (header != null)
        {
            EO.Wpf.Primitives.TabStripPanel panel = GetTabStripPanel(header);
            if (panel != null)
                panel.InvalidateMeasure();
        }
    }

    //Get the TabStripPanel object from the header. This
    //element holds all the tab item headers
    private EO.Wpf.Primitives.TabStripPanel GetTabStripPanel(DependencyObject obj)
    {
        if (obj is EO.Wpf.Primitives.TabStripPanel)
            return (EO.Wpf.Primitives.TabStripPanel)obj;

        int n = System.Windows.Media.VisualTreeHelper.GetChildrenCount(obj);
        for (int i = 0; i < n; i++)
        {
            DependencyObject child = System.Windows.Media.VisualTreeHelper.GetChild(obj, i);
            EO.Wpf.Primitives.TabStripPanel panel = GetTabStripPanel(child);
            if (panel != null)
                return panel;
        }

        return null;
    }

    void m_WebView_FaviconChanged(object sender, EventArgs e)
    {
        ....

        //Force layout on tab headers when Favicon changes
        RelayoutTabHeaders();
    }

    void m_WebView_TitleChanged(object sender, EventArgs e)
    {
        Title = m_WebView.Title;

        //Force layout on tab headers when Title changes
        RelayoutTabHeaders();
    }

    ....
}