Create ast/ and parsing/ subdirectories and move appropriate files

src/ast-literal-reindexer.h

-// Copyright 2015 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_AST_LITERAL_REINDEXER
-#define V8_AST_LITERAL_REINDEXER
-
-#include "src/ast.h"
-#include "src/scopes.h"
-
-namespace v8 {
-namespace internal {
-
-class AstLiteralReindexer final : public AstVisitor {
- public:
-  AstLiteralReindexer() : AstVisitor(), next_index_(0) {}
-
-  int count() const { return next_index_; }
-  void Reindex(Expression* pattern);
-  int NextIndex() { return next_index_++; }
-
- private:
-#define DEFINE_VISIT(type) void Visit##type(type* node) override;
-  AST_NODE_LIST(DEFINE_VISIT)
-#undef DEFINE_VISIT
-
-  void VisitStatements(ZoneList<Statement*>* statements) override;
-  void VisitDeclarations(ZoneList<Declaration*>* declarations) override;
-  void VisitArguments(ZoneList<Expression*>* arguments);
-  void VisitObjectLiteralProperty(ObjectLiteralProperty* property);
-
-  void UpdateIndex(MaterializedLiteral* literal) {
-    literal->literal_index_ = next_index_++;
-  }
-
-  void Visit(AstNode* node) override { node->Accept(this); }
-
-  int next_index_;
-
-  DISALLOW_COPY_AND_ASSIGN(AstLiteralReindexer);
-};
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_AST_LITERAL_REINDEXER