[wptrunner] Work around WebView bugs in ChromeDriver runner (#48792)
- Restore the window-creation logic prior to #48610 for WebView, which
turns out to not support the "new window" command
(https://crbug.com/375275185). - Catch all
WebDriverException
s when issuing CDP commands, since
WebView fails onBrowser.resetPermissions
withBrowser context management is not supported.
. Resetting state is now best-effort.