Remove grab-bag includes of v8.h from several files.

src/ast-literal-reindexer.cc

Index: src/ast-literal-reindexer.cc
diff --git a/src/ast-literal-reindexer.cc b/src/ast-literal-reindexer.cc
index 50729be25164abfe063b18bfca2534f2e7a444ce..860a3961f05b66a292ea1dac421ad261fad63549 100644
--- a/src/ast-literal-reindexer.cc
+++ b/src/ast-literal-reindexer.cc
@@ -1,10 +1,10 @@
 // Copyright 2015 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.
-#include "src/v8.h"
 
-#include "src/ast.h"
 #include "src/ast-literal-reindexer.h"
+
+#include "src/ast.h"
 #include "src/scopes.h"
 
 namespace v8 {