Create ast/ and parsing/ subdirectories and move appropriate files

src/preparse-data-format.h

-// Copyright 2011 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_PREPARSE_DATA_FORMAT_H_
-#define V8_PREPARSE_DATA_FORMAT_H_
-
-namespace v8 {
-namespace internal {
-
-// Generic and general data used by preparse data recorders and readers.
-
-struct PreparseDataConstants {
- public:
-  // Layout and constants of the preparse data exchange format.
-  static const unsigned kMagicNumber = 0xBadDead;
-  static const unsigned kCurrentVersion = 11;
-
-  static const int kMagicOffset = 0;
-  static const int kVersionOffset = 1;
-  static const int kHasErrorOffset = 2;
-  static const int kFunctionsSizeOffset = 3;
-  static const int kSizeOffset = 4;
-  static const int kHeaderSize = 5;
-
-  // If encoding a message, the following positions are fixed.
-  static const int kMessageStartPos = 0;
-  static const int kMessageEndPos = 1;
-  static const int kMessageArgCountPos = 2;
-  static const int kParseErrorTypePos = 3;
-  static const int kMessageTemplatePos = 4;
-  static const int kMessageArgPos = 5;
-
-  static const unsigned char kNumberTerminator = 0x80u;
-};
-
-
-}  // namespace internal
-}  // namespace v8.
-
-#endif  // V8_PREPARSE_DATA_FORMAT_H_