Skia Filter Quality and Scaling Metrics

include/core/SkDevice.h

Index: include/core/SkDevice.h
diff --git a/include/core/SkDevice.h b/include/core/SkDevice.h
index 65ec56f902fb87ea9926957db6b099438f90ecba..01bf7f944f449d1d850f708209de6b99a0bb68a7 100644
--- a/include/core/SkDevice.h
+++ b/include/core/SkDevice.h
@@ -376,6 +376,9 @@ protected:
         return NULL;
     }
 
+    // A helper function used by derived classes to log the scale factor of a bitmap or image draw.
+    static void LogDrawScaleFactor(const SkMatrix&, SkFilterQuality);
+
 private:
     friend class SkCanvas;
     friend struct DeviceCM; //for setMatrixClip