[Interpreter] Implement ForIn in bytecode graph builder.

src/interpreter/bytecodes.h

Index: src/interpreter/bytecodes.h
diff --git a/src/interpreter/bytecodes.h b/src/interpreter/bytecodes.h
index bbce0fbbe9383dbd0ca49b7877c0491d2d0f8155..d2d2ec30e740d74567e1531ba2ddc27007c6a320 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -199,9 +199,12 @@ namespace interpreter {
   V(JumpIfUndefinedConstant, OperandType::kIdx8)                               \
                                                                                \
   /* Complex flow control For..in */                                           \
-  V(ForInPrepare, OperandType::kReg8)                                          \
-  V(ForInNext, OperandType::kReg8, OperandType::kReg8)                         \
-  V(ForInDone, OperandType::kReg8)                                             \
+  V(ForInPrepare, OperandType::kReg8, OperandType::kReg8, OperandType::kReg8,  \
+    OperandType::kReg8)                                                        \
+  V(ForInNext, OperandType::kReg8, OperandType::kReg8, OperandType::kReg8,     \
+    OperandType::kReg8)                                                        \
+  V(ForInDone, OperandType::kReg8, OperandType::kReg8)                         \
+  V(ForInStep, OperandType::kReg8)                                             \
                                                                                \
   /* Non-local flow control */                                                 \
   V(Throw, OperandType::kNone)                                                 \