Simplify reference management in SkPDF

src/pdf/SkPDFGraphicState.h

Index: src/pdf/SkPDFGraphicState.h
diff --git a/src/pdf/SkPDFGraphicState.h b/src/pdf/SkPDFGraphicState.h
index 1c54e6cf217a8c45251cd09870ff83c458b591c9..a759d56b9f6585b82f6b26aa294a01c7563e50df 100644
--- a/src/pdf/SkPDFGraphicState.h
+++ b/src/pdf/SkPDFGraphicState.h
@@ -36,9 +36,6 @@ public:
 
     virtual ~SkPDFGraphicState();
 
-    virtual void getResources(const SkTSet<SkPDFObject*>& knownResourceObjects,
-                              SkTSet<SkPDFObject*>* newResourceObjects);
-
     // Override emitObject so that we can populate the dictionary on
     // demand.
     virtual void emitObject(SkWStream* stream, SkPDFCatalog* catalog);
@@ -78,7 +75,6 @@ public:
 
 private:
     const SkPaint fPaint;
-    SkTDArray<SkPDFObject*> fResources;
     bool fPopulated;
     bool fSMask;
 
@@ -87,8 +83,6 @@ private:
 
     void populateDict();
 
-    static SkPDFObject* GetInvertFunction();
-
     typedef SkPDFDict INHERITED;
 };