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

chrome/browser/metrics/variations/variations_registry_syncer_unittest_win.cc

 // Copyright (c) 2013 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/string_split.h"
 #include "base/string_util.h"
+#include "base/strings/string_split.h"
 #include "chrome/browser/metrics/variations/variations_registry_syncer_win.h"
 #include "chrome/common/metrics/variations/variations_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST(VariationsRegistrySyncer, BuildGoogleUpdateExperimentLabel) {
   struct {
     const char* active_group_pairs;
     const wchar_t* expected_ids;
   } test_cases[] = {
     // Empty group.
@@ skipping 156 matching lines @@
     {L";;;;", L""},
   };
 
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test_cases); ++i) {
     string16 non_variation_labels =
         chrome_variations::VariationsRegistrySyncer::ExtractNonVariationLabels(
             test_cases[i].input_label);
     EXPECT_EQ(test_cases[i].expected_output, non_variation_labels);
   }
 }