[ignition] Make a DCHECK in ConstantArrayBuilder more useful

src/interpreter/constant-array-builder.h

Index: src/interpreter/constant-array-builder.h
diff --git a/src/interpreter/constant-array-builder.h b/src/interpreter/constant-array-builder.h
index 8e95913e57792b445e7039465d99c82e1ee1b5bb..c99c8e7c59969343173c5f38f152154926575177 100644
--- a/src/interpreter/constant-array-builder.h
+++ b/src/interpreter/constant-array-builder.h
@@ -82,7 +82,10 @@ class V8_EXPORT_PRIVATE ConstantArrayBuilder final BASE_EMBEDDED {
     size_t Allocate(Handle<Object> object);
     Handle<Object> At(size_t index) const;
     void InsertAt(size_t index, Handle<Object> object);
-    bool AllElementsAreUnique() const;
+
+#if DEBUG
+    void CheckAllElementsAreUnique() const;
+#endif
 
     inline size_t available() const { return capacity() - reserved() - size(); }
     inline size_t reserved() const { return reserved_; }