Create ast/ and parsing/ subdirectories and move appropriate files

src/parsing/parser.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_PARSER_H_
-#define V8_PARSER_H_
+#ifndef V8_PARSING_PARSER_H_
+#define V8_PARSING_PARSER_H_
 
 #include "src/allocation.h"
-#include "src/ast.h"
+#include "src/ast/ast.h"
+#include "src/ast/scopes.h"
 #include "src/compiler.h"  // TODO(titzer): remove this include dependency
+#include "src/parsing/preparse-data.h"
+#include "src/parsing/preparse-data-format.h"
+#include "src/parsing/preparser.h"
 #include "src/pending-compilation-error-handler.h"
-#include "src/preparse-data.h"
-#include "src/preparse-data-format.h"
-#include "src/preparser.h"
-#include "src/scopes.h"
 
 namespace v8 {
 
 class ScriptCompiler;
 
 namespace internal {
 
 class Target;
 
 // A container for the inputs, configuration options, and outputs of parsing.
@@ skipping 1376 matching lines @@
 
 
 DoExpression* ParserTraits::ParseDoExpression(bool* ok) {
   return parser_->ParseDoExpression(ok);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_PARSER_H_
+#endif  // V8_PARSING_PARSER_H_