Wrap cropAndResize with an op decorator

src/engine.ts

@@ -194,7 +194,7 @@ export class Engine implements TensorManager, TensorTracker, DataMover {
       saved.push(x);
       return x;
     };
-    const scopeName = this.activeScope.name;
+    const scopeName = this.activeScope != null ? this.activeScope.name : '';
     const startingBytecount = this.numBytes;
     const startingNumTensors = this.numTensors;
 

src/ops/image_ops.ts

@@ -301,4 +301,4 @@ export const resizeBilinear = op({resizeBilinear_});
 export const resizeNearestNeighbor = op({resizeNearestNeighbor_});
 export const nonMaxSuppression = op({nonMaxSuppression_});
 export const nonMaxSuppressionAsync = nonMaxSuppressionAsync_;
-export const cropAndResize = cropAndResize_;
+export const cropAndResize = op({cropAndResize_});