capturePage captures wrong window (NW2)

[DjulLau]

NWJS Version : 0.49.0
Operating System : Windows 10

I recently tried upgrading my app from v0.28 to v0.49.
In this app I open a second window behind the main window to do some capture.

Expected behavior

capturePage should capture content of the window it's called from.

Actual behavior

capturePage captures content from the main window even it's called from the new one.
It works as before if NW2 is disabled with --disable-features=nw2

How to reproduce

Have two html files:

• index.html with color1 bg
• new.html with color2 bg
• index.html script

    require("nw.gui").Window.open("new.html", {}, (wnd) => {
        wnd.on("loaded", (e) => {
            wnd.capturePage(buffer => {
                require('fs').writeFile('screenshot.png', buffer, (err) => {
                    if (err) throw err;
                });
            }, { format: 'png', datatype: 'buffer' });
        });
    });

• Open screenshot.png and see it's color1
• Add "chromium-args": "--disable-features=nw2"
• Run again
• Open sceenshot.png and see it's color2

[rogerwang]

This is fixed in git and will be available in the next nightly build.

[rogerwang]

CC #7230