Simplify AST ID generation.

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"  // For CachedDataMode
@@ skipping 358 matching lines @@
     typedef ZoneList<v8::internal::Expression*>* ExpressionList;
     typedef ZoneList<ObjectLiteral::Property*>* PropertyList;
     typedef ZoneList<v8::internal::Statement*>* StatementList;
 
     // For constructing objects returned by the traversing functions.
     typedef AstNodeFactory<AstConstructionVisitor> Factory;
   };
 
   explicit ParserTraits(Parser* parser) : parser_(parser) {}
 
-  // Custom operations executed when FunctionStates are created and destructed.
-  template <typename FunctionState>
-  static void SetUpFunctionState(FunctionState* function_state) {
-    function_state->saved_id_gen_ = *function_state->ast_node_id_gen_;
-    *function_state->ast_node_id_gen_ =
-        AstNode::IdGen(BailoutId::FirstUsable().ToInt());
-  }
-
-  template <typename FunctionState>
-  static void TearDownFunctionState(FunctionState* function_state) {
-    if (function_state->outer_function_state_ != NULL) {
-      *function_state->ast_node_id_gen_ = function_state->saved_id_gen_;
-    }
-  }
-
   // Helper functions for recursive descent.
   bool IsEvalOrArguments(const AstRawString* identifier) const;
   V8_INLINE bool IsFutureStrictReserved(const AstRawString* identifier) const;
 
   // Returns true if the expression is of type "this.foo".
   static bool IsThisProperty(Expression* expression);
 
   static bool IsIdentifier(Expression* expression);
 
   bool IsPrototype(const AstRawString* identifier) const;
@@ skipping 528 matching lines @@
  private:
   static const int kLiteralTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_