When using 'domain' module, it calls various EventEmitter methods
like 'listenerCount' that we do not expect. To avoid this problem
in the future, we validate the method name before sending it over
the protocol connection.
- This leaves just `recordVideos` and `videoSize` options on the context.
- Videos are saved to `artifactsPath`. We also save their ids to trace.
- `context.close()` waits for the processed videos.
- Print parentGuid when it is not available for __create__.
Some bots show generic "something is undefined" error - let's
get better information about the failure.
- Ignore events on disposed objects outside of tests.
Some bots show this happening for "previewUpdated" - let's see
whether there are more important events that misbehave.
This is a large rework of selectors:
- Each BrowserContext now has a separate Selectors instance that has its own registrations.
Most of them share a single sharedSelectors instance, but contexts created for a connected
browser have their own instance.
- Connected browser now gets a RemoteBrowser object that encapsulates Selectors and Browser.
This Selectors object is registered with the api selectors.
- Public selectors.register api iterates over all registered Selectors channels
and registers in each of them.
- createSelector testing method migrated to ElementHandle._createSelectorForTest.
Sometimes I see "cannot call emit on the undefined" error on the bots.
This change adds some more logging, so we could potentially identify where
the issue comes from.
