Bug 1817314 - Make dom/serializers buildable outside of a unified build environment r=andi

Differential Revision: https://phabricator.services.mozilla.com/D170123

dom/serializers/moz.build

@@ -33,6 +33,4 @@ UNIFIED_SOURCES += [
 
 FINAL_LIBRARY = "xul"
 
-REQUIRES_UNIFIED_BUILD = True
-
 CRASHTEST_MANIFESTS += ["crashtests/crashtests.list"]

dom/serializers/nsDocumentEncoder.cpp

@@ -17,6 +17,8 @@
 #include "nsCRT.h"
 #include "nsIContentSerializer.h"
 #include "nsIDocumentEncoder.h"
+#include "nsINode.h"
+#include "nsIContentInlines.h"
 #include "nsComponentManagerUtils.h"
 #include "nsIOutputStream.h"
 #include "nsRange.h"