Use a direct include of strings headers in chrome/common/, part 1.

chrome/common/extensions/features/simple_feature.cc

 // Copyright (c) 2012 The Chromium 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 "chrome/common/extensions/features/simple_feature.h"
 
 #include <map>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/sha1.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "chrome/common/chrome_switches.h"
 
 using chrome::VersionInfo;
 
 namespace extensions {
 
 namespace {
 
 struct Mappings {
   Mappings() {
@@ skipping 406 matching lines @@
     return false;
 
   if (whitelist_.find(extension_id) != whitelist_.end() ||
       whitelist_.find(HashExtensionId(extension_id)) != whitelist_.end())
     return true;
 
   return false;
 }
 
 }  // namespace extensions