[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 10c67618077a291dffc5e4116e8466630c3179f9..6513a56ddc06d3de92ae5fad2eeb556ff6b46088 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -152,7 +152,6 @@ namespace interpreter {
   /* Cast operators */                                                         \
   V(ToName, OperandType::kNone)                                                \
   V(ToNumber, OperandType::kNone)                                              \
-  V(ToObject, OperandType::kNone)                                              \
                                                                                \
   /* Literals */                                                               \
   V(CreateRegExpLiteral, OperandType::kIdx8, OperandType::kIdx8,               \
@@ -193,9 +192,12 @@ 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)                                                 \