Use a single Token::INIT for all variable initialization

src/parser.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_PARSER_H_
 #define V8_PARSER_H_
 
 #include "src/allocation.h"
 #include "src/ast.h"
 #include "src/compiler.h"  // TODO(titzer): remove this include dependency
@@ skipping 967 matching lines @@
     enum Kind { NORMAL, PARAMETER };
     Parser* parser;
     Scope* declaration_scope;
     Scope* scope;
     Scope* hoist_scope;
     VariableMode mode;
     bool is_const;
     bool needs_init;
     int declaration_pos;
     int initialization_pos;
-    Token::Value init_op;
     Kind declaration_kind;
   };
 
   struct DeclarationParsingResult {
     struct Declaration {
       Declaration(Expression* pattern, int initializer_position,
                   Expression* initializer)
           : pattern(pattern),
             initializer_position(initializer_position),
             initializer(initializer) {}
@@ skipping 388 matching lines @@
 
 DoExpression* ParserTraits::ParseDoExpression(bool* ok) {
   return parser_->ParseDoExpression(ok);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSER_H_