[Interpreter] Always store current context in the frames context slot.

src/interpreter/bytecodes.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INTERPRETER_BYTECODES_H_
 #define V8_INTERPRETER_BYTECODES_H_
 
 #include <iosfwd>
 
 // Clients of this interface shouldn't depend on lots of interpreter internals.
@@ skipping 290 matching lines @@
   bool is_valid() const { return index_ != kIllegalIndex; }
 
   static Register FromParameterIndex(int index, int parameter_count);
   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;
+  // Returns the register which holds the current context object.
+  static Register current_context();
+  bool is_current_context() const;
 
   // Returns the register for the incoming new target value.
   static Register new_target();
   bool is_new_target() const;
 
   static Register FromOperand(uint8_t operand);
   uint8_t ToOperand() const;
 
   static Register FromWideOperand(uint16_t operand);
   uint16_t ToWideOperand() const;
@@ skipping 116 matching lines @@
 
 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode);
 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type);
 std::ostream& operator<<(std::ostream& os, const OperandSize& operand_type);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODES_H_