Create ast/ and parsing/ subdirectories and move appropriate files

src/parsing/rewriter.h

Index: src/parsing/rewriter.h
diff --git a/src/rewriter.h b/src/parsing/rewriter.h
similarity index 91%
rename from src/rewriter.h
rename to src/parsing/rewriter.h
index fdb36d1d3e20773fd28557766a5f5f833127d314..477644a7567f92a09a74d67677d62059331dcfbf 100644
--- a/src/rewriter.h
+++ b/src/parsing/rewriter.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef V8_REWRITER_H_
-#define V8_REWRITER_H_
+#ifndef V8_PARSING_REWRITER_H_
+#define V8_PARSING_REWRITER_H_
 
 namespace v8 {
 namespace internal {
@@ -33,4 +33,4 @@ class Rewriter {
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_REWRITER_H_
+#endif  // V8_PARSING_REWRITER_H_