[Interpreter] Add support for new local function context creation.

src/interpreter/bytecodes.h

Index: src/interpreter/bytecodes.h
diff --git a/src/interpreter/bytecodes.h b/src/interpreter/bytecodes.h
index cc2ebea5d74015129e02934aa50085066f850cb3..167639656216d89e1aa082d7889861dbd9832d9b 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -68,6 +68,10 @@ namespace interpreter {
   V(KeyedStoreICStrict, OperandType::kReg8, OperandType::kReg8,                \
     OperandType::kIdx8)                                                        \
                                                                                \
+  /* Context operations */                                                     \
+  V(PushContext, OperandType::kReg8)                                           \
+  V(PopContext, OperandType::kReg8)                                            \
+                                                                               \
   /* Binary Operators */                                                       \
   V(Add, OperandType::kReg8)                                                   \
   V(Sub, OperandType::kReg8)                                                   \
@@ -176,6 +180,10 @@ class Register {
   int ToParameterIndex(int parameter_count) const;
   static int MaxParameterIndex();
 
+  // Returns the register for the function's closure object.
+  static Register function_closure();
+  bool is_function_closure() const;
+
   // Returns the register for the function's outer context.
   static Register function_context();
   bool is_function_context() const;