SkImage method for detecting lazy decoding

src/image/SkImage.cpp

Index: src/image/SkImage.cpp
diff --git a/src/image/SkImage.cpp b/src/image/SkImage.cpp
index 9c996dc7b836c8124c8d6af803d6bf1150f72668..715b4f4043a3a0febdb763367ebeab892b8d33b3 100644
--- a/src/image/SkImage.cpp
+++ b/src/image/SkImage.cpp
@@ -287,6 +287,10 @@ SkImage* SkImage::NewFromPicture(const SkPicture* picture, const SkISize& dimens
     return NewFromGenerator(SkImageGenerator::NewFromPicture(dimensions, picture, matrix, paint));
 }
 
+bool SkImage::isLazyGenerated() const {
+    return as_IB(this)->onIsLazyGenerated();
+}
+
 //////////////////////////////////////////////////////////////////////////////////////
 
 #if !SK_SUPPORT_GPU