Remove CONST_LEGACY VariableMode

src/globals.h

 // Copyright 2012 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_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 868 matching lines @@
 
 // ES6 section 20.1.2.6 Number.MAX_SAFE_INTEGER
 const double kMaxSafeInteger = 9007199254740991.0;  // 2^53-1
 
 
 // The order of this enum has to be kept in sync with the predicates below.
 enum VariableMode : uint8_t {
   // User declared variables:
   VAR,  // declared via 'var', and 'function' declarations
 
-  CONST_LEGACY,  // declared via legacy 'const' declarations
-
   LET,  // declared via 'let' declarations (first lexical)
 
   CONST,  // declared via 'const' declarations (last lexical)
 
   // Variables introduced by the compiler:
   TEMPORARY,  // temporary variables (not user-visible), stack-allocated
               // unless the scope as a whole has forced context allocation
 
   DYNAMIC,  // always require dynamic lookup (we don't know
             // the declaration)
@@ skipping 18 matching lines @@
 inline bool IsDeclaredVariableMode(VariableMode mode) {
   STATIC_ASSERT(VAR == 0);  // Implies that mode >= VAR.
   return mode <= CONST;
 }
 
 
 inline bool IsLexicalVariableMode(VariableMode mode) {
   return mode >= LET && mode <= CONST;
 }
 
-
-inline bool IsImmutableVariableMode(VariableMode mode) {
-  return mode == CONST || mode == CONST_LEGACY;
-}
-
 enum VariableLocation : uint8_t {
   // Before and during variable allocation, a variable whose location is
   // not yet determined.  After allocation, a variable looked up as a
   // property on the global object (and possibly absent).  name() is the
   // variable name, index() is invalid.
   UNALLOCATED,
 
   // A slot in the parameter section on the stack.  index() is the
   // parameter index, counting left-to-right.  The receiver is index -1;
   // the first parameter is index 0.
@@ skipping 222 matching lines @@
  public:
   enum { kNone = 0x00, kSignedSmall = 0x01, kNumber = 0x3, kAny = 0x7 };
 };
 
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_