Add initial parser support for harmony iteration

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index d1cfb8eaf318c281bb249d03c731567f349d6ff8..60a86fb895231a70ccb2c4c7ed8313a2d0e1667a 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -5447,6 +5447,14 @@ void HOptimizedGraphBuilder::VisitForInStatement(ForInStatement* stmt) {
 }
 
 
+void HOptimizedGraphBuilder::VisitForOfStatement(ForOfStatement* stmt) {
+  ASSERT(!HasStackOverflow());
+  ASSERT(current_block() != NULL);
+  ASSERT(current_block()->HasPredecessor());
+  return Bailout("ForOfStatement");
+}
+
+
 void HOptimizedGraphBuilder::VisitTryCatchStatement(TryCatchStatement* stmt) {
   ASSERT(!HasStackOverflow());
   ASSERT(current_block() != NULL);