Use a direct include of strings headers in rlz/, sandbox/, skia/, sql/, sync/.

rlz/chromeos/lib/rlz_value_store_chromeos.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 "rlz/chromeos/lib/rlz_value_store_chromeos.h"
 
 #include "base/file_util.h"
 #include "base/files/important_file_writer.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/logging.h"
 #include "base/sequenced_task_runner.h"
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "rlz/lib/lib_values.h"
 #include "rlz/lib/recursive_cross_process_lock_posix.h"
 #include "rlz/lib/rlz_lib.h"
 
 namespace rlz_lib {
 
 namespace {
 
 // Product names.
@@ skipping 306 matching lines @@
   g_testing_rlz_store_path_ = directory;
 }
 
 std::string RlzStoreFilenameStr() {
   return GetRlzStorePath().value();
 }
 
 }  // namespace testing
 
 }  // namespace rlz_lib