[Experimental] Supporting OOPIF printing

services/pdf_compositor/manifest.json

Index: services/pdf_compositor/manifest.json
diff --git a/services/pdf_compositor/manifest.json b/services/pdf_compositor/manifest.json
new file mode 100644
index 0000000000000000000000000000000000000000..91bad4b57a0c8023e9e9e577c462cd95519cc8a7
--- /dev/null
+++ b/services/pdf_compositor/manifest.json
@@ -0,0 +1,15 @@
+{
+  "name": "pdf_compositor",
+  "display_name": "PDF Compositor Service",
+  "interface_provider_specs": {
+    "service_manager:connector": {
+      "provides": {
+        "composite": [ "pdf_compositor::mojom::PdfCompositor" ]
+      },
+      "requires": {
+        "service_manager": [ "service_manager:all_users" ],
+        "content_plugin": [ "discardable_memory" ]
+      }
+    }
+  }
+}