Fill incomplete images in SkCodec parent class

include/codec/SkScaledCodec.h

Index: include/codec/SkScaledCodec.h
diff --git a/include/codec/SkScaledCodec.h b/include/codec/SkScaledCodec.h
index 20428d8d73f40b0a391dfa061131fe1358fbb27c..6e569d5d381b532d11ef6b1962eba1d3b311c39c 100644
--- a/include/codec/SkScaledCodec.h
+++ b/include/codec/SkScaledCodec.h
@@ -47,7 +47,7 @@ protected:
      */
     SkISize onGetScaledDimensions(float desiredScale) const override;
 
-    Result onGetPixels(const SkImageInfo&, void*, size_t, const Options&, SkPMColor*, int*)
+    Result onGetPixels(const SkImageInfo&, void*, size_t, const Options&, SkPMColor*, int*, int*)
             override;
     SkEncodedFormat onGetEncodedFormat() const override {
         return fCodec->getEncodedFormat();
@@ -57,6 +57,10 @@ protected:
         return fCodec->reallyHasAlpha();
     }
 
+    uint32_t onGetFillValue(SkColorType colorType, SkAlphaType alphaType) const override;
+
+    SkScanlineOrder onGetScanlineOrder() const override;
+
 private:
 
     SkAutoTDelete<SkCodec> fCodec;