PDF: why do we have flags no one uses (or can use)?

src/pdf/SkPDFDocument.cpp

Index: src/pdf/SkPDFDocument.cpp
diff --git a/src/pdf/SkPDFDocument.cpp b/src/pdf/SkPDFDocument.cpp
index 75af5a947b81ee7cbaa4e5a14e670820dfbfe093..8280551f8aabdcb5bfd283a1fd0613d514178b11 100644
--- a/src/pdf/SkPDFDocument.cpp
+++ b/src/pdf/SkPDFDocument.cpp
@@ -47,10 +47,10 @@ static void perform_font_subsetting(SkPDFCatalog* catalog,
     }
 }
 
-SkPDFDocument::SkPDFDocument(Flags flags)
+SkPDFDocument::SkPDFDocument()
         : fXRefFileOffset(0),
           fTrailerDict(NULL) {
-    fCatalog.reset(new SkPDFCatalog(flags));
+    fCatalog.reset(SkNEW(SkPDFCatalog));
     fDocCatalog = SkNEW_ARGS(SkPDFDict, ("Catalog"));
     fCatalog->addObject(fDocCatalog, true);
     fFirstPageResources = NULL;