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

rlz/lib/financial_ping_test.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.
 //
 // A test application for the FinancialPing class.
 //
 // These tests should not be executed on the build server:
 // - They modify machine state (registry).
 //
 // These tests require write access to HKCU and HKLM.
 //
 // The "GGLA" brand is used to test the normal code flow of the code, and the
 // "TEST" brand is used to test the supplementary brand code code flow.  In one
 // case below, the brand "GOOG" is used because the code wants to use a brand
 // that is neither of the two mentioned above.
 
 #include "rlz/lib/financial_ping.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "rlz/lib/lib_values.h"
 #include "rlz/lib/machine_id.h"
 #include "rlz/lib/rlz_lib.h"
 #include "rlz/lib/rlz_value_store.h"
 #include "rlz/test/rlz_test_helpers.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_WIN)
@@ skipping 251 matching lines @@
   EXPECT_TRUE(rlz_lib::RecordProductEvent(rlz_lib::TOOLBAR_NOTIFIER,
       rlz_lib::IE_DEFAULT_SEARCH, rlz_lib::SET_TO_GOOGLE));
   EXPECT_FALSE(rlz_lib::FinancialPing::IsPingTime(rlz_lib::TOOLBAR_NOTIFIER,
                                                   false));
 
   EXPECT_TRUE(rlz_lib::FinancialPing::ClearLastPingTime(
       rlz_lib::TOOLBAR_NOTIFIER));
   EXPECT_TRUE(rlz_lib::FinancialPing::IsPingTime(rlz_lib::TOOLBAR_NOTIFIER,
                                                  false));
 }