7498491: update process_id to use OriginatingProcess type

The upstream Chromium API changed - URLLoaderFactoryParams::process_id
was changed from an integer to a union type network::OriginatingProcess
that distinguishes between browser and renderer processes.

- For browser process requests, use OriginatingProcess::browser()
- For renderer process lookups, check !is_browser() and use
  renderer_process().value() to get the child_id

Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7498491

shell/browser/api/electron_api_utility_process.cc

@@ -19,6 +19,7 @@
 #include "content/public/common/result_codes.h"
 #include "gin/object_template_builder.h"
 #include "mojo/public/cpp/bindings/pending_receiver.h"
+#include "services/network/public/cpp/originating_process.h"
 #include "shell/browser/api/message_port.h"
 #include "shell/browser/browser.h"
 #include "shell/browser/javascript_environment.h"
@@ -212,7 +213,7 @@ UtilityProcessWrapper::UtilityProcessWrapper(
   mojo::PendingRemote<network::mojom::URLLoaderFactory> url_loader_factory;
   network::mojom::URLLoaderFactoryParamsPtr loader_params =
       network::mojom::URLLoaderFactoryParams::New();
-  loader_params->process_id = pid_;
+  loader_params->process_id = network::OriginatingProcess::browser();
   loader_params->is_orb_enabled = false;
   loader_params->is_trusted = true;
   if (create_network_observer) {