Bug 281941 – [WebDriver][BiDi] Implement the browser module

• Status: NEW
• Component: WebDriver

[Lauro Moura]

Spec: https://w3c.github.io/webdriver-bidi/#module-browser
Dashboard: https://wpt.fyi/results/webdriver/tests/bidi/browser?label=experimental&label=master&aligned

> The browser module contains commands for managing the remote end browser process.

Commands:

- browser.close - https://w3c.github.io/webdriver-bidi/#command-browser-close
- browser.createUserContext - https://w3c.github.io/webdriver-bidi/#command-browser-createUserContext
- browser.getClientWindows - https://w3c.github.io/webdriver-bidi/#command-browser-getClientWindows
- browser.getUserContexts - https://w3c.github.io/webdriver-bidi/#command-browser-getUserContexts
- browser.removeUserContext - https://w3c.github.io/webdriver-bidi/#command-browser-removeUserContext
- browser.setClientWindowState - https://w3c.github.io/webdriver-bidi/#command-browser-setClientWindowState

Types: https://w3c.github.io/webdriver-bidi/#module-browser-types

[Radar WebKit Bug Importer]

<rdar://problem/138880409>