Use a direct include of strings headers in chrome/test/.

chrome/test/mini_installer_test/installer_path_provider.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/test/mini_installer_test/installer_path_provider.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
+#include "chrome/test/mini_installer_test/installer_test_util.h"
 #include "chrome/test/mini_installer_test/mini_installer_test_constants.h"
-#include "chrome/test/mini_installer_test/installer_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 struct FilePathInfo {
   base::FileEnumerator::FileInfo info;
   base::FilePath path;
 };
 
 bool CompareDate(const FilePathInfo& a, const FilePathInfo& b) {
@@ skipping 201 matching lines @@
 
 std::string InstallerPathProvider::GetCurrentBuild() {
   return current_build_;
 }
 
 std::string InstallerPathProvider::GetPreviousBuild() {
   return previous_build_;
 }
 
 }  // namespace