* refactor: remove electron::WebRequestAPI interface
Remove the |electron::WebRequestAPI| interface class.
Use handles to the concrete class |electron::api::WebRequest| instead.
Prerequisite for https://github.com/electron/electron/pull/48762.
Two classes (electron::ProxyingURLLoaderFactory and electron::ProxyingWebSocket)
hold a handle to a WebRequest via |raw_ptr<electron::WebRequestAPI>|.
|electron::WebRequestAPI| is a pure virtual interface whose concrete impl is
|electron::api::WebRequest|.
This is a problem when migrating |electron::api::WebRequest| to cppgc:
we need to change those |raw_ptr<>|s to |cppgc::WeakPersistent<>| but
can't instantiate |cppgc::WeakPersistent<electron::WebRequestAPI>| as-is.
We also can't change it to inherit from |cppgc::GarbageCollectedMixin|,
since that causes problems when |electron::api::WebRequest| inherits from
both |electron::WebRequestAPI| and |cppgc::GarbageCollected|.
* refactor: use name web_request, not web_request_api
* refactor: make ProxyingURLLoaderFactory::web_request() private
* chore: make linter happy by fixing whitespace
f6ffb55c72