Do not save/restore AST id generator.

src/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/v8.h"
 
 #include "src/api.h"
 #include "src/ast.h"
 #include "src/bailout-reason.h"
 #include "src/base/platform/platform.h"
@@ skipping 324 matching lines @@
 
 #define CHECK_FAILED  /**/);   \
   if (failed_) return NULL; \
   ((void)0
 #define DUMMY )  // to make indentation work
 #undef DUMMY
 
 // ----------------------------------------------------------------------------
 // Implementation of Parser
 
-class ParserTraits::Checkpoint
-    : public ParserBase<ParserTraits>::CheckpointBase {
- public:
-  explicit Checkpoint(ParserBase<ParserTraits>* parser)
-      : CheckpointBase(parser), parser_(parser) {
-    saved_ast_node_id_gen_ = *parser_->ast_node_id_gen_;
-  }
-
-  void Restore() {
-    CheckpointBase::Restore();
-    *parser_->ast_node_id_gen_ = saved_ast_node_id_gen_;
-  }
-
- private:
-  ParserBase<ParserTraits>* parser_;
-  AstNode::IdGen saved_ast_node_id_gen_;
-};
-
-
 bool ParserTraits::IsEvalOrArguments(const AstRawString* identifier) const {
   return identifier == parser_->ast_value_factory()->eval_string() ||
          identifier == parser_->ast_value_factory()->arguments_string();
 }
 
 
 bool ParserTraits::IsPrototype(const AstRawString* identifier) const {
   return identifier == parser_->ast_value_factory()->prototype_string();
 }
 
@@ skipping 4594 matching lines @@
 
   // We cannot internalize on a background thread; a foreground task will take
   // care of calling Parser::Internalize just before compilation.
 
   if (compile_options() == ScriptCompiler::kProduceParserCache) {
     if (result != NULL) *info_->cached_data() = recorder.GetScriptData();
     log_ = NULL;
   }
 }
 } }  // namespace v8::internal