Create ast/ and parsing/ subdirectories and move appropriate files

src/ast/ast.h

Index: src/ast/ast.h
diff --git a/src/ast.h b/src/ast/ast.h
similarity index 99%
rename from src/ast.h
rename to src/ast/ast.h
index cb9fb6f5596e49fea53fa1fe102b29b4bda2adc2..973f1056ca913b9886d2079e98dfa5e04422d06c 100644
--- a/src/ast.h
+++ b/src/ast/ast.h
@@ -2,25 +2,25 @@
 // 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 {
@@ -3672,4 +3672,4 @@ class AstNodeFactory final BASE_EMBEDDED {
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_AST_H_
+#endif  // V8_AST_AST_H_