Add PDF compositor service

components/printing/service/pdf_compositor_manifest.json

Index: components/printing/service/pdf_compositor_manifest.json
diff --git a/components/printing/service/pdf_compositor_manifest.json b/components/printing/service/pdf_compositor_manifest.json
new file mode 100644
index 0000000000000000000000000000000000000000..9e9b05929d8852813f61d5ccf011f96ba9b41200
--- /dev/null
+++ b/components/printing/service/pdf_compositor_manifest.json
@@ -0,0 +1,15 @@
+{
+  "name": "pdf_compositor",
+  "display_name": "PDF Compositor Service",
+  "interface_provider_specs": {
+    "service_manager:connector": {
+      "provides": {
+        "composite": [ "printing::mojom::PdfCompositor" ]
+       },
+       "requires": {
+         "service_manager": [ "service_manager:all_users" ],
+         "content_browser": [ "utility" ]
+       }
+     }
+  }
+}