Simplify reference management in SkPDF

src/pdf/SkPDFCatalog.h

Index: src/pdf/SkPDFCatalog.h
diff --git a/src/pdf/SkPDFCatalog.h b/src/pdf/SkPDFCatalog.h
index ecefd0a0728ab4252ac42f711cd2937f01e7663d..535997f29f14b36b5dc008f3e7f7a92e34603c19 100644
--- a/src/pdf/SkPDFCatalog.h
+++ b/src/pdf/SkPDFCatalog.h
@@ -49,12 +49,6 @@ public:
      */
     void emitObjectNumber(SkWStream* stream, SkPDFObject* obj);
 
-    /** Return the number of bytes that would be emitted for the passed
-     *  object's object number.
-     *  @param obj         The object of interest
-     */
-    size_t getObjectNumberSize(SkPDFObject* obj);
-
     /** Return the document flags in effect for this catalog/document.
      */
     SkPDFDocument::Flags getDocumentFlags() const { return fDocumentFlags; }
@@ -76,10 +70,6 @@ public:
      */
     SkPDFObject* getSubstituteObject(SkPDFObject* object);
 
-    /** get the resources of substitute objects.
-     */
-    SkTSet<SkPDFObject*>* getSubstituteList(bool firstPage);
-
 private:
     struct Rec {
         Rec(SkPDFObject* object, bool onFirstPage)
@@ -119,7 +109,7 @@ private:
 
     SkPDFDocument::Flags fDocumentFlags;
 
-    int findObjectIndex(SkPDFObject* obj) const;
+    int findObjectIndex(SkPDFObject* obj);
 
     int assignObjNum(SkPDFObject* obj);
 };