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

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index 55e886e19d07b5dcaf832bbb1caf038bd712bd81..862bf84a2a0a4a4089242c495259a29e74830daa 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -11489,6 +11489,9 @@ void HOptimizedGraphBuilder::VisitEmptyParentheses(EmptyParentheses* expr) {
   UNREACHABLE();
 }
 
+void HOptimizedGraphBuilder::VisitGetIterator(GetIterator* expr) {
+  UNREACHABLE();
+}
 
 HValue* HOptimizedGraphBuilder::AddThisFunction() {
   return AddInstruction(BuildThisFunction());