[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 a146241a49b46153cb45d5adfa1929fd830bc7ea..eb0a7b03f9855575150822b82a51763fb8b100a9 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)                                                   \
@@ -167,6 +171,10 @@ 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;