[Interpreter] Add support for for..in.

src/interpreter/bytecodes.cc

Index: src/interpreter/bytecodes.cc
diff --git a/src/interpreter/bytecodes.cc b/src/interpreter/bytecodes.cc
index 53c4128fdd613c40438b98a1065e4fa421f93779..8b99f4fb1ce97bc46763a45d71e85117ae015a86 100644
--- a/src/interpreter/bytecodes.cc
+++ b/src/interpreter/bytecodes.cc
@@ -163,7 +163,9 @@ bool Bytecodes::IsJump(Bytecode bytecode) {
   return bytecode == Bytecode::kJump || bytecode == Bytecode::kJumpIfTrue ||
          bytecode == Bytecode::kJumpIfFalse ||
          bytecode == Bytecode::kJumpIfToBooleanTrue ||
-         bytecode == Bytecode::kJumpIfToBooleanFalse;
+         bytecode == Bytecode::kJumpIfToBooleanFalse ||
+         bytecode == Bytecode::kJumpIfNull ||
+         bytecode == Bytecode::kJumpIfUndefined;
 }
 
 
@@ -173,7 +175,9 @@ bool Bytecodes::IsJumpConstant(Bytecode bytecode) {
          bytecode == Bytecode::kJumpIfTrueConstant ||
          bytecode == Bytecode::kJumpIfFalseConstant ||
          bytecode == Bytecode::kJumpIfToBooleanTrueConstant ||
-         bytecode == Bytecode::kJumpIfToBooleanFalseConstant;
+         bytecode == Bytecode::kJumpIfToBooleanFalseConstant ||
+         bytecode == Bytecode::kJumpIfNull ||
+         bytecode == Bytecode::kJumpIfUndefinedConstant;
 }