More minor cleanups of the interface


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7446 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeEmitterGen.h b/utils/TableGen/CodeEmitterGen.h
index 60f11de..1642034 100644
--- a/utils/TableGen/CodeEmitterGen.h
+++ b/utils/TableGen/CodeEmitterGen.h
@@ -7,7 +7,9 @@
 #ifndef CODEMITTERGEN_H
 #define CODEMITTERGEN_H
 
-#include "Record.h"
+#include <string>
+#include <iosfwd>
+class RecordKeeper;
 
 class CodeEmitterGen {
   RecordKeeper &Records;