Create ast/ and parsing/ subdirectories and move appropriate files

src/ast/ast.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_AST_H_
-#define V8_AST_H_
+#ifndef V8_AST_AST_H_
+#define V8_AST_AST_H_
 
 #include "src/assembler.h"
-#include "src/ast-value-factory.h"
+#include "src/ast/ast-value-factory.h"
+#include "src/ast/modules.h"
+#include "src/ast/variables.h"
 #include "src/bailout-reason.h"
 #include "src/base/flags.h"
 #include "src/base/smart-pointers.h"
 #include "src/factory.h"
 #include "src/isolate.h"
 #include "src/list.h"
-#include "src/modules.h"
+#include "src/parsing/token.h"
 #include "src/regexp/jsregexp.h"
 #include "src/runtime/runtime.h"
 #include "src/small-pointer-list.h"
-#include "src/token.h"
 #include "src/types.h"
 #include "src/utils.h"
-#include "src/variables.h"
 
 namespace v8 {
 namespace internal {
 
 // The abstract syntax tree is an intermediate, light-weight
 // representation of the parsed JavaScript code suitable for
 // compilation to native code.
 
 // Nodes are allocated in a separate zone, which allows faster
 // allocation and constant-time deallocation of the entire syntax
@@ skipping 3631 matching lines @@
   // ZoneObjects which need to persist until scope analysis must be allocated in
   // the parser-level zone.
   Zone* parser_zone_;
   AstValueFactory* ast_value_factory_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_AST_H_
+#endif  // V8_AST_AST_H_