Add a src rect to drawImageLattice() API

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index a50b5c6bd644b14ed4b08a478edbf0bfa48c5e39..d4d361d4fb9fc9c70e610b0f44bbcddc3436bd09 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -1501,7 +1501,7 @@ void SkGpuDevice::drawProducerLattice(const SkDraw& draw, GrTextureProducer* pro
     }
 
     std::unique_ptr<SkLatticeIter> iter(
-            new SkLatticeIter(producer->width(), producer->height(), lattice, dst));
+            new SkLatticeIter(lattice, dst));
     fDrawContext->drawImageLattice(fClip, grPaint, *draw.fMatrix, producer->width(),
                                    producer->height(), std::move(iter), dst);
 }