[parser] Modify some const qualifications

src/parsing/parser.cc

 // 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.
 
 #include "src/parsing/parser.h"
 
 #include <memory>
 
 #include "src/api.h"
 #include "src/ast/ast-expression-rewriter.h"
@@ skipping 559 matching lines @@
   char array[100];
   const char* string = DoubleToCString(double_value, ArrayVector(array));
   return parser_->ast_value_factory()->GetOneByteString(string);
 }
 
 
 const AstRawString* ParserTraits::GetNextSymbol(Scanner* scanner) const {
   return parser_->scanner()->NextSymbol(parser_->ast_value_factory());
 }
 
-Expression* ParserTraits::ThisExpression(int pos) const {
+Expression* ParserTraits::ThisExpression(int pos) {
   return parser_->NewUnresolved(parser_->ast_value_factory()->this_string(),
                                 pos, pos + 4, Variable::THIS);
 }
 
 Expression* ParserTraits::NewSuperPropertyReference(AstNodeFactory* factory,
-                                                    int pos) const {
+                                                    int pos) {
   // this_function[home_object_symbol]
   VariableProxy* this_function_proxy = parser_->NewUnresolved(
       parser_->ast_value_factory()->this_function_string(), pos);
   Expression* home_object_symbol_literal =
       factory->NewSymbolLiteral("home_object_symbol", kNoSourcePosition);
   Expression* home_object = factory->NewProperty(
       this_function_proxy, home_object_symbol_literal, pos);
   return factory->NewSuperPropertyReference(
       ThisExpression(pos)->AsVariableProxy(), home_object, pos);
 }
 
 Expression* ParserTraits::NewSuperCallReference(AstNodeFactory* factory,
-                                                int pos) const {
+                                                int pos) {
   VariableProxy* new_target_proxy = parser_->NewUnresolved(
       parser_->ast_value_factory()->new_target_string(), pos);
   VariableProxy* this_function_proxy = parser_->NewUnresolved(
       parser_->ast_value_factory()->this_function_string(), pos);
   return factory->NewSuperCallReference(ThisExpression(pos)->AsVariableProxy(),
                                         new_target_proxy, this_function_proxy,
                                         pos);
 }
 
-Expression* ParserTraits::NewTargetExpression(int pos) const {
+Expression* ParserTraits::NewTargetExpression(int pos) {
   static const int kNewTargetStringLength = 10;
   auto proxy =
       parser_->NewUnresolved(parser_->ast_value_factory()->new_target_string(),
                              pos, pos + kNewTargetStringLength);
   proxy->set_is_new_target();
   return proxy;
 }
 
 Expression* ParserTraits::FunctionSentExpression(AstNodeFactory* factory,
                                                  int pos) const {
@@ skipping 29 matching lines @@
     }
     default:
       DCHECK(false);
   }
   return NULL;
 }
 
 Expression* ParserTraits::ExpressionFromIdentifier(const AstRawString* name,
                                                    int start_position,
                                                    int end_position,
-                                                   InferName infer) const {
+                                                   InferName infer) {
   if (infer == InferName::kYes && parser_->fni_ != NULL) {
     parser_->fni_->PushVariableName(name);
   }
   return parser_->NewUnresolved(name, start_position, end_position);
 }
 
 
 Expression* ParserTraits::ExpressionFromString(int pos, Scanner* scanner,
                                                AstNodeFactory* factory) const {
   const AstRawString* symbol = GetSymbol(scanner);
@@ skipping 6247 matching lines @@
   node->Print(Isolate::Current());
 }
 #endif  // DEBUG
 
 #undef CHECK_OK
 #undef CHECK_OK_VOID
 #undef CHECK_FAILED
 
 }  // namespace internal
 }  // namespace v8