Create ast/ and parsing/ subdirectories and move appropriate files

src/parsing/parameter-initializer-rewriter.cc

Index: src/parsing/parameter-initializer-rewriter.cc
diff --git a/src/parameter-initializer-rewriter.cc b/src/parsing/parameter-initializer-rewriter.cc
similarity index 93%
rename from src/parameter-initializer-rewriter.cc
rename to src/parsing/parameter-initializer-rewriter.cc
index 28f741c1f6238887a1cad6d185344b6aec2ecf62..eaf1889392086294270d5526163d4d33c080a866 100644
--- a/src/parameter-initializer-rewriter.cc
+++ b/src/parsing/parameter-initializer-rewriter.cc
@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "src/parameter-initializer-rewriter.h"
+#include "src/parsing/parameter-initializer-rewriter.h"
 
-#include "src/ast.h"
-#include "src/ast-expression-visitor.h"
-#include "src/scopes.h"
+#include "src/ast/ast.h"
+#include "src/ast/ast-expression-visitor.h"
+#include "src/ast/scopes.h"
 
 namespace v8 {
 namespace internal {