Create ast/ and parsing/ subdirectories and move appropriate files

src/ast/variables.cc

Index: src/ast/variables.cc
diff --git a/src/variables.cc b/src/ast/variables.cc
similarity index 96%
rename from src/variables.cc
rename to src/ast/variables.cc
index b8bcbd03d196e84bf358f0863d4191dcca88a438..8e007823863aea9e403252fa891b59866b708929 100644
--- a/src/variables.cc
+++ b/src/ast/variables.cc
@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "src/variables.h"
+#include "src/ast/variables.h"
 
-#include "src/ast.h"
-#include "src/scopes.h"
+#include "src/ast/ast.h"
+#include "src/ast/scopes.h"
 
 namespace v8 {
 namespace internal {