[async-iteration] add support for for-await-of loops in Async Functions

src/interpreter/bytecode-array-builder.h

Index: src/interpreter/bytecode-array-builder.h
diff --git a/src/interpreter/bytecode-array-builder.h b/src/interpreter/bytecode-array-builder.h
index 382867fa6580c61eda02003e7837e0220ef8017c..3c8fae789b3d8b1fdd383ecb9b777bbbe77262c7 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -127,6 +127,9 @@ class V8_EXPORT_PRIVATE BytecodeArrayBuilder final
   // Named load property of the @@iterator symbol.
   BytecodeArrayBuilder& LoadIteratorProperty(Register object,
                                              int feedback_slot);
+  // Named load property of the @@asyncIterator symbol.
+  BytecodeArrayBuilder& LoadAsyncIteratorProperty(Register object,
+                                                  int feedback_slot);
 
   // Store properties. Flag for NeedsSetFunctionName() should
   // be in the accumulator.