Add PDF compositor service

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 92281418c31e75398293c37baaaa427a8e5056ec..8458471ba3fcf1b367532cb8ebaa4b7ac82c51c2 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -379,6 +379,10 @@
 #include "chrome/browser/media/cast_remoting_connector.h"
 #endif
 
+#if BUILDFLAG(ENABLE_PRINTING)
+#include "components/printing/service/public/interfaces/pdf_compositor.mojom.h"
+#endif
+
 #if BUILDFLAG(ENABLE_WAYLAND_SERVER)
 #include "chrome/browser/chrome_browser_main_extra_parts_exo.h"
 #endif
@@ -3286,6 +3290,12 @@ void ChromeContentBrowserClient::RegisterOutOfProcessServices(
   services->insert(std::make_pair("media",
                                   base::ASCIIToUTF16("Media Service")));
 #endif
+
+#if BUILDFLAG(ENABLE_PRINTING)
+  services->insert(
+      std::make_pair(printing::mojom::kServiceName,
+                     base::ASCIIToUTF16("PDF Compositor Service")));
+#endif
 }
 
 std::unique_ptr<base::Value>