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

src/pdf/SkPDFDocument.h

 
 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkPDFDocument_DEFINED
@@ skipping 11 matching lines @@
 class SkPDFObject;
 class SkWStream;
 template <typename T> class SkTSet;
 
 /** \class SkPDFDocument
 
     A SkPDFDocument assembles pages together and generates the final PDF file.
 */
 class SkPDFDocument {
 public:
-    enum Flags {
-        kNoCompression_Flags = 0x01,  //!< DEPRECATED.
-        kFavorSpeedOverSize_Flags = 0x01,  //!< Don't compress the stream, but
-                                           // if it is already compressed return
-                                           // the compressed stream.
-        kNoLinks_Flags       = 0x02,  //!< do not honor link annotations.
-
-        kDraftMode_Flags     = 0x01,
-    };
-    /** Create a PDF document.
-     */
-    explicit SK_API SkPDFDocument(Flags flags = (Flags)0);
+    SK_API SkPDFDocument();
     SK_API ~SkPDFDocument();
 
     /** Output the PDF to the passed stream.  It is an error to call this (it
      *  will return false and not modify stream) if no pages have been added
      *  or there are pages missing (i.e. page 1 and 3 have been added, but not
      *  page 2).
      *
      *  @param stream    The writable output stream to send the PDF to.
      */
     SK_API bool emitPDF(SkWStream* stream);
@@ skipping 50 matching lines @@
     size_t headerSize();
 
     /** Output the PDF footer to the passed stream.
      *  @param stream    The writable output stream to send the footer to.
      *  @param objCount  The number of objects in the PDF.
      */
     void emitFooter(SkWStream* stream, int64_t objCount);
 };
 
 #endif