[turbofan] First step towards sanitizing for-in and making it optimizable.

src/compiler/js-operator.cc

Index: src/compiler/js-operator.cc
diff --git a/src/compiler/js-operator.cc b/src/compiler/js-operator.cc
index 37fd547c9d74075775f4f25bcbbde83ce7e9fa38..87df6a0c923d8ee4428f8bfe45521ac6d59e7d90 100644
--- a/src/compiler/js-operator.cc
+++ b/src/compiler/js-operator.cc
@@ -238,6 +238,10 @@ const CreateClosureParameters& CreateClosureParametersOf(const Operator* op) {
   V(HasProperty, Operator::kNoProperties, 2, 1)           \
   V(TypeOf, Operator::kPure, 1, 1)                        \
   V(InstanceOf, Operator::kNoProperties, 2, 1)            \
+  V(ForInDone, Operator::kPure, 2, 1)                     \
+  V(ForInNext, Operator::kNoProperties, 4, 1)             \
+  V(ForInPrepare, Operator::kNoProperties, 1, 3)          \
+  V(ForInStep, Operator::kPure, 1, 1)                     \
   V(StackCheck, Operator::kNoProperties, 0, 0)            \
   V(CreateFunctionContext, Operator::kNoProperties, 1, 1) \
   V(CreateWithContext, Operator::kNoProperties, 2, 1)     \