[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 43f4df3237e1c87c923fc37c942c1754aa1ef98a..b54e4408010fa3a23261189ba1d399815bd3049d 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -193,9 +193,12 @@ 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)                                                 \