Image filters: Make a recursive, forward-mapping bounds traversal.

src/core/SkLocalMatrixImageFilter.h

Index: src/core/SkLocalMatrixImageFilter.h
diff --git a/src/core/SkLocalMatrixImageFilter.h b/src/core/SkLocalMatrixImageFilter.h
index f908d025a5a8d6d483f3e834c5a299829f753917..1d546e75e2a794aa39e1b1c3ffc4e26a94cfb83b 100644
--- a/src/core/SkLocalMatrixImageFilter.h
+++ b/src/core/SkLocalMatrixImageFilter.h
@@ -27,7 +27,8 @@ protected:
     void flatten(SkWriteBuffer&) const override;
     bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
                        SkBitmap* result, SkIPoint* offset) const override;
-    bool onFilterBounds(const SkIRect& src, const SkMatrix&, SkIRect* dst) const override;
+    bool onFilterBounds(const SkIRect& src, const SkMatrix&, SkIRect* dst,
+                        MapDirection) const override;
 
 private:
     SkLocalMatrixImageFilter(const SkMatrix& localM, SkImageFilter* input);