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

sync/util/cryptographer_unittest.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 "sync/util/cryptographer.h"
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "sync/protocol/password_specifics.pb.h"
 #include "sync/test/fake_encryptor.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace syncer {
 
 namespace {
 
 using ::testing::_;
@@ skipping 174 matching lines @@
   other_cryptographer.Bootstrap(token);
   EXPECT_TRUE(other_cryptographer.is_ready());
 
   const char secret[] = "secret";
   sync_pb::EncryptedData encrypted;
   EXPECT_TRUE(other_cryptographer.EncryptString(secret, &encrypted));
   EXPECT_TRUE(cryptographer_.CanDecryptUsingDefaultKey(encrypted));
 }
 
 }  // namespace syncer