Add alpha type to texture producer

src/image/SkImage_Raster.cpp

Index: src/image/SkImage_Raster.cpp
diff --git a/src/image/SkImage_Raster.cpp b/src/image/SkImage_Raster.cpp
index 358e91a0fa75473f5e6a65153cadefacb10096d5..46d6639bdd448cf0656bedfb19129341913a2ee3 100644
--- a/src/image/SkImage_Raster.cpp
+++ b/src/image/SkImage_Raster.cpp
@@ -208,7 +208,7 @@ GrTexture* SkImage_Raster::asTextureRef(GrContext* ctx, const GrTextureParams& p
     uint32_t uniqueID;
     sk_sp<GrTexture> tex = this->refPinnedTexture(&uniqueID);
     if (tex) {
-        GrTextureAdjuster adjuster(fPinnedTexture.get(), fBitmap.bounds(),
+        GrTextureAdjuster adjuster(fPinnedTexture.get(), fBitmap.alphaType(), fBitmap.bounds(),
                                    fPinnedUniqueID, fBitmap.colorSpace());
         return adjuster.refTextureSafeForParams(params, gammaTreatment, nullptr);
     }