This doesn't follow the spec to a tee. Our OutOfProcessWebView already
has a bitmap that can be used as the window screenshot. Therefore, we
can bypass the steps that assume we need to access the window's frame
buffer in-flight.
We also don't create an HTMLCanvasElement. We would need a Document in
the WebDriver process to do so. Instead, we can still run the encoding
steps exactly as-is using the screenshot bitmap.
This extends the IPC calls `get_document_element` and
`query_selector_all` to be usable by the WebDriver. For this the
`WebDriverConnection` provides the same interfaces and takes care of
routing the data through the Browser.
This allows the WebDriver to create a cookie.
We use a Web::Cookie::ParsedCookie to transport the data through IPC
to take advantage of the RFC6265 Section 5.3 implementation in the
CookieJar.
This adds a new option "--webdriver" that opens a local unix socket
in /tmp/browser_{pid} which the WebDriver server can use to send
commands to the Browser instance.
Co-authored-by: Florent Castelli <florent.castelli@gmail.com>
