Create ast/ and parsing/ subdirectories and move appropriate files

src/ast/scopes.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_SCOPES_H_
-#define V8_SCOPES_H_
+#ifndef V8_AST_SCOPES_H_
+#define V8_AST_SCOPES_H_
 
-#include "src/ast.h"
+#include "src/ast/ast.h"
 #include "src/pending-compilation-error-handler.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 
 class ParseInfo;
 
 // A hash map to support fast variable declaration and lookup.
 class VariableMap: public ZoneHashMap {
@@ skipping 823 matching lines @@
   PendingCompilationErrorHandler pending_error_handler_;
 
   // For tracking which classes are declared consecutively. Needed for strong
   // mode.
   int class_declaration_group_start_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_SCOPES_H_
+#endif  // V8_AST_SCOPES_H_