chrome: Update include paths of string_split.h to its new location.

chrome/browser/policy/device_management_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 <ostream>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
-#include "base/string_split.h"
+#include "base/strings/string_split.h"
 #include "chrome/browser/policy/cloud_policy_constants.h"
 #include "chrome/browser/policy/device_management_service.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "content/public/test/test_browser_thread.h"
 #include "net/base/escape.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/test_url_fetcher_factory.h"
 #include "net/url_request/url_request_status.h"
@@ skipping 604 matching lines @@
   EXPECT_CALL(*this, OnJobDone(DM_STATUS_REQUEST_FAILED, _));
   EXPECT_CALL(*this, OnJobRetry(_)).Times(0);
   fetcher->set_status(net::URLRequestStatus(net::URLRequestStatus::FAILED,
                                             net::ERR_NETWORK_CHANGED));
   fetcher->set_url(GURL(kServiceUrl));
   fetcher->delegate()->OnURLFetchComplete(fetcher);
   Mock::VerifyAndClearExpectations(this);
 }
 
 }  // namespace policy