SkPDF: Glyph Useage Map improvements

src/pdf/SkPDFDevice.h

Index: src/pdf/SkPDFDevice.h
diff --git a/src/pdf/SkPDFDevice.h b/src/pdf/SkPDFDevice.h
index 4dded7316c785042384e1c15e9e612cdd751d5e5..7c7ddf43cbe93520fef281bbfc9d184ee4dca6f1 100644
--- a/src/pdf/SkPDFDevice.h
+++ b/src/pdf/SkPDFDevice.h
@@ -30,7 +30,6 @@ class SkPDFDocument;
 class SkPDFDict;
 class SkPDFFont;
 class SkPDFFormXObject;
-class SkPDFGlyphSetMap;
 class SkPDFObject;
 class SkRRect;
 
@@ -159,13 +158,6 @@ public:
         return fInitialTransform;
     }
 
-    /** Returns a SkPDFGlyphSetMap which represents glyph usage of every font
-     *  that shows on this device.
-     */
-    const SkPDFGlyphSetMap& getFontGlyphUsage() const {
-        return *(fFontGlyphUsage.get());
-    }
-
     SkPDFCanon* getCanon() const;
 
     // It is important to not confuse GraphicStateEntry with SkPDFGraphicState, the
@@ -265,9 +257,6 @@ private:
 
     const SkClipStack* fClipStack;
 
-    // Glyph ids used for each font on this device.
-    std::unique_ptr<SkPDFGlyphSetMap> fFontGlyphUsage;
-
     SkScalar fRasterDpi;
 
     SkBitmap fLegacyBitmap;
@@ -283,7 +272,7 @@ private:
     SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override;
 
     void init();
-    void cleanUp(bool clearFontUsage);
+    void cleanUp();
     SkPDFFormXObject* createFormXObjectFromDevice();
 
     void drawFormXObjectWithMask(int xObjectIndex,