From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: deepak1556 <hop2deep@gmail.com>
Date: Fri, 20 May 2022 00:29:34 +0900
Subject: custom_protocols_plzserviceworker.patch

Allow registering custom protocols to handle service worker main script fetching with PlzServiceWorker.

Refs https://bugs.chromium.org/p/chromium/issues/detail?id=996511

diff --git a/content/browser/service_worker/service_worker_context_wrapper.cc b/content/browser/service_worker/service_worker_context_wrapper.cc
index 8127b7951b2070d49ee99cd93199454355ab925d..2056a3408e6449920d77a9c1659d2732e736e429 100644
--- a/content/browser/service_worker/service_worker_context_wrapper.cc
+++ b/content/browser/service_worker/service_worker_context_wrapper.cc
@@ -1959,6 +1959,26 @@ ServiceWorkerContextWrapper::GetLoaderFactoryForBrowserInitiatedRequest(
       loader_factory_bundle_info =
           context()->loader_factory_bundle_for_update_check()->Clone();
 
+  // Give the embedder a chance to register custom schemes that can
+  // handle loading the service worker main script.
+  // Previous registration triggered by
+  // ServiceWorkerContextWrapper::CreateNonNetworkPendingURLLoaderFactoryBundleForUpdateCheck
+  // happens early on browser startup before the JS in the main process
+  // is run by the embedder.
+  auto& pending_scheme_specific_factories =
+      static_cast<blink::PendingURLLoaderFactoryBundle*>(
+      loader_factory_bundle_info.get())
+      ->pending_scheme_specific_factories();
+  ContentBrowserClient::NonNetworkURLLoaderFactoryMap non_network_factories;
+  GetContentClient()
+      ->browser()
+      ->RegisterNonNetworkServiceWorkerUpdateURLLoaderFactories(
+          storage_partition_->browser_context(), &non_network_factories);
+  for (auto& [scheme, factory_remote] : non_network_factories) {
+    pending_scheme_specific_factories.emplace(
+        scheme, std::move(factory_remote));
+  }
+
   if (auto* config = content::WebUIConfigMap::GetInstance().GetConfig(
           browser_context(), scope)) {
     // If this is a Service Worker for a WebUI, the WebUI's URLDataSource
@@ -1978,9 +1998,7 @@ ServiceWorkerContextWrapper::GetLoaderFactoryForBrowserInitiatedRequest(
             features::kEnableServiceWorkersForChromeScheme) &&
         scope.scheme_piece() == kChromeUIScheme) {
       config->RegisterURLDataSource(browser_context());
-      static_cast<blink::PendingURLLoaderFactoryBundle*>(
-          loader_factory_bundle_info.get())
-          ->pending_scheme_specific_factories()
+      pending_scheme_specific_factories
           .emplace(kChromeUIScheme, CreateWebUIServiceWorkerLoaderFactory(
                                         browser_context(), kChromeUIScheme,
                                         base::flat_set<std::string>()));
@@ -1988,9 +2006,7 @@ ServiceWorkerContextWrapper::GetLoaderFactoryForBrowserInitiatedRequest(
                    features::kEnableServiceWorkersForChromeUntrusted) &&
                scope.scheme_piece() == kChromeUIUntrustedScheme) {
       config->RegisterURLDataSource(browser_context());
-      static_cast<blink::PendingURLLoaderFactoryBundle*>(
-          loader_factory_bundle_info.get())
-          ->pending_scheme_specific_factories()
+      pending_scheme_specific_factories
           .emplace(kChromeUIUntrustedScheme,
                    CreateWebUIServiceWorkerLoaderFactory(
                        browser_context(), kChromeUIUntrustedScheme,
