From 7d05fb2a1b236e8ed67ee0b47a852b447ddcee1b Mon Sep 17 00:00:00 2001
From: Shelley Vohr <shelley.vohr@gmail.com>
Date: Mon, 20 Jan 2025 10:23:44 +0100
Subject: [PATCH] fix: broken OOP `window.print()` on macOS/Linux (#45214)

fix: broken OOP printing on macOS/Linux
---
 .../electron_content_utility_client.cc        | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/shell/utility/electron_content_utility_client.cc b/shell/utility/electron_content_utility_client.cc
index 5c5226cfea70..45baca4f0b08 100644
--- a/shell/utility/electron_content_utility_client.cc
+++ b/shell/utility/electron_content_utility_client.cc
@@ -31,6 +31,11 @@
 #include "components/services/print_compositor/public/mojom/print_compositor.mojom.h"  // nogncheck
 #endif  // BUILDFLAG(ENABLE_PRINTING)
 
+#if BUILDFLAG(ENABLE_OOP_PRINTING)
+#include "chrome/services/printing/print_backend_service_impl.h"
+#include "chrome/services/printing/public/mojom/print_backend_service.mojom.h"
+#endif  // BUILDFLAG(ENABLE_OOP_PRINTING)
+
 #if BUILDFLAG(ENABLE_PRINTING) && BUILDFLAG(IS_WIN)
 #include "chrome/services/printing/pdf_to_emf_converter_factory.h"
 #endif
@@ -72,6 +77,21 @@ auto RunPrintCompositor(
 }
 #endif
 
+#if BUILDFLAG(ENABLE_OOP_PRINTING)
+auto RunPrintingSandboxedPrintBackendHost(
+    mojo::PendingReceiver<printing::mojom::SandboxedPrintBackendHost>
+        receiver) {
+  return std::make_unique<printing::SandboxedPrintBackendHostImpl>(
+      std::move(receiver));
+}
+auto RunPrintingUnsandboxedPrintBackendHost(
+    mojo::PendingReceiver<printing::mojom::UnsandboxedPrintBackendHost>
+        receiver) {
+  return std::make_unique<printing::UnsandboxedPrintBackendHostImpl>(
+      std::move(receiver));
+}
+#endif  // BUILDFLAG(ENABLE_OOP_PRINTING)
+
 auto RunProxyResolver(
     mojo::PendingReceiver<proxy_resolver::mojom::ProxyResolverFactory>
         receiver) {
@@ -122,6 +142,11 @@ void ElectronContentUtilityClient::RegisterMainThreadServices(
   services.Add(RunPrintCompositor);
 #endif
 
+#if BUILDFLAG(ENABLE_OOP_PRINTING)
+  services.Add(RunPrintingSandboxedPrintBackendHost);
+  services.Add(RunPrintingUnsandboxedPrintBackendHost);
+#endif
+
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW) || \
     (BUILDFLAG(ENABLE_PRINTING) && BUILDFLAG(IS_WIN))
   services.Add(RunPrintingService);