[ignition] desugar GetIterator() via bytecode rather than via AST

src/interpreter/bytecode-generator.h

Index: src/interpreter/bytecode-generator.h
diff --git a/src/interpreter/bytecode-generator.h b/src/interpreter/bytecode-generator.h
index 7b49021b38d8765e3d83b6e0b2b05598518e0bab..14683ffb6902e63ea1719bd396e011dcdb410cbb 100644
--- a/src/interpreter/bytecode-generator.h
+++ b/src/interpreter/bytecode-generator.h
@@ -193,6 +193,7 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
   int feedback_index(FeedbackVectorSlot slot) const;
 
   Handle<Name> home_object_symbol() const { return home_object_symbol_; }
+  Handle<Name> iterator_symbol() const { return iterator_symbol_; }
   Handle<Name> prototype_string() const { return prototype_string_; }
   Handle<FixedArray> empty_fixed_array() const { return empty_fixed_array_; }
 
@@ -216,6 +217,7 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
   int loop_depth_;
 
   Handle<Name> home_object_symbol_;
+  Handle<Name> iterator_symbol_;
   Handle<Name> prototype_string_;
   Handle<FixedArray> empty_fixed_array_;
 };