Ladybird: Remove unnecessary RegisterWithProcessManager enum

This was only put in place because on SerenityOS, we wanted to use the
pid of the WebContent process, rather than the peer pid for the socket.

When launching with SystemServer, this got annoying. However, now that
we only have the case that the UI process spawns processes, we can
get rid of this hack. This restores the ability to see WebContent
processes' statistics in the task manager widget.

Ladybird/HelperProcess.cpp

@@ -10,17 +10,11 @@
 #include <LibCore/Process.h>
 #include <LibWebView/ProcessManager.h>
 
-enum class RegisterWithProcessManager {
-    No,
-    Yes,
-};
-
 template<typename ClientType, typename... ClientArguments>
 static ErrorOr<NonnullRefPtr<ClientType>> launch_server_process(
     StringView server_name,
     ReadonlySpan<ByteString> candidate_server_paths,
     Vector<ByteString> arguments,
-    RegisterWithProcessManager register_with_process_manager,
     Ladybird::EnableCallgrindProfiling enable_callgrind_profiling,
     ClientArguments&&... client_arguments)
 {
@@ -51,8 +45,7 @@ static ErrorOr<NonnullRefPtr<ClientType>> launch_server_process(
             if constexpr (requires { process.client->set_pid(pid_t {}); })
                 process.client->set_pid(process.process.pid());
 
-            if (register_with_process_manager == RegisterWithProcessManager::Yes)
-                WebView::ProcessManager::the().add_process(WebView::process_type_from_name(server_name), process.process.pid());
+            WebView::ProcessManager::the().add_process(WebView::process_type_from_name(server_name), process.process.pid());
 
             if (enable_callgrind_profiling == Ladybird::EnableCallgrindProfiling::Yes) {
                 dbgln();
@@ -117,7 +110,7 @@ ErrorOr<NonnullRefPtr<WebView::WebContentClient>> launch_web_content_process(
     arguments.append("--image-decoder-socket"sv);
     arguments.append(ByteString::number(image_decoder_socket.fd()));
 
-    return launch_server_process<WebView::WebContentClient>("WebContent"sv, candidate_web_content_paths, move(arguments), RegisterWithProcessManager::No, web_content_options.enable_callgrind_profiling, view);
+    return launch_server_process<WebView::WebContentClient>("WebContent"sv, candidate_web_content_paths, move(arguments), web_content_options.enable_callgrind_profiling, view);
 }
 
 ErrorOr<NonnullRefPtr<ImageDecoderClient::Client>> launch_image_decoder_process(ReadonlySpan<ByteString> candidate_image_decoder_paths)
@@ -128,7 +121,7 @@ ErrorOr<NonnullRefPtr<ImageDecoderClient::Client>> launch_image_decoder_process(
         arguments.append(server.value());
     }
 
-    return launch_server_process<ImageDecoderClient::Client>("ImageDecoder"sv, candidate_image_decoder_paths, arguments, RegisterWithProcessManager::Yes, Ladybird::EnableCallgrindProfiling::No);
+    return launch_server_process<ImageDecoderClient::Client>("ImageDecoder"sv, candidate_image_decoder_paths, arguments, Ladybird::EnableCallgrindProfiling::No);
 }
 
 ErrorOr<NonnullRefPtr<Web::HTML::WebWorkerClient>> launch_web_worker_process(ReadonlySpan<ByteString> candidate_web_worker_paths, NonnullRefPtr<Protocol::RequestClient> request_client)
@@ -140,7 +133,7 @@ ErrorOr<NonnullRefPtr<Web::HTML::WebWorkerClient>> launch_web_worker_process(Rea
         ByteString::number(socket.fd()),
     };
 
-    return launch_server_process<Web::HTML::WebWorkerClient>("WebWorker"sv, candidate_web_worker_paths, move(arguments), RegisterWithProcessManager::Yes, Ladybird::EnableCallgrindProfiling::No);
+    return launch_server_process<Web::HTML::WebWorkerClient>("WebWorker"sv, candidate_web_worker_paths, move(arguments), Ladybird::EnableCallgrindProfiling::No);
 }
 
 ErrorOr<NonnullRefPtr<Protocol::RequestClient>> launch_request_server_process(ReadonlySpan<ByteString> candidate_request_server_paths, StringView serenity_resource_root, Vector<ByteString> const& certificates)
@@ -160,7 +153,7 @@ ErrorOr<NonnullRefPtr<Protocol::RequestClient>> launch_request_server_process(Re
         arguments.append(server.value());
     }
 
-    return launch_server_process<Protocol::RequestClient>("RequestServer"sv, candidate_request_server_paths, move(arguments), RegisterWithProcessManager::Yes, Ladybird::EnableCallgrindProfiling::No);
+    return launch_server_process<Protocol::RequestClient>("RequestServer"sv, candidate_request_server_paths, move(arguments), Ladybird::EnableCallgrindProfiling::No);
 }
 
 ErrorOr<IPC::File> connect_new_request_server_client(Protocol::RequestClient& client)