Use a direct include of strings headers in chrome/browser/r*-s*/.

chrome/browser/search_engines/template_url_service_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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
-#include "base/string_util.h"
 #include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/mock_time_provider.h"
 #include "base/threading/thread.h"
 #include "base/time.h"
 #include "chrome/browser/history/history_notifications.h"
 #include "chrome/browser/history/history_service.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/search_engines/search_host_to_urls_map.h"
 #include "chrome/browser/search_engines/search_terms_data.h"
 #include "chrome/browser/search_engines/template_url.h"
@@ skipping 1544 matching lines @@
   EXPECT_EQ(8U, loaded_url->input_encodings().size());
 
   // Reload the model to verify it was actually saved to the database and the
   // duplicate encodings were removed.
   test_util_.ResetModel(true);
   ASSERT_EQ(initial_count + 1, model()->GetTemplateURLs().size());
   loaded_url = model()->GetTemplateURLForKeyword(ASCIIToUTF16("keyword"));
   ASSERT_FALSE(loaded_url == NULL);
   EXPECT_EQ(4U, loaded_url->input_encodings().size());
 }