Run this sample code:

"

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;

public class LoadHtml extends Application {

    public void start(Stage primaryStage) throws Exception {
        primaryStage.setTitle(System.getProperty("java.runtime.version"));

        WebView browser = new WebView();
        WebEngine engine = browser.getEngine();

        engine.loadContent("<div style=\"text-align: right; height:80%\">test</div>\n"
                + "<div style=\"text-align: right; height:80%\">test</div>");

        StackPane sp = new StackPane();
        sp.getChildren().add(browser);

        Scene scene = new Scene(sp);

        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}
"
Actual Result:
You will see that the scrollBars are still overlapping the content. 

Expect result:
Scrollbars should not overlap the content.