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

chrome/browser/performance_monitor/key_builder.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/browser/performance_monitor/key_builder.h"
 
 #include "base/format_macros.h"
 #include "base/logging.h"
-#include "base/string_split.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/strings/string_split.h"
 
 namespace performance_monitor {
 
 namespace {
 
 const char kDelimiter = '!';
 
 // These values are used as the portion of the generated key which represents
 // the event/metric type when inserting values in the database. We use an ASCII
 // character as a mapping, rather than the enum of the metric or event itself,
@@ skipping 216 matching lines @@
   std::vector<std::string> split;
   base::SplitString(key, kDelimiter, &split);
   DCHECK(split[METRIC_TYPE].size() == 1);
   return MetricKey(split[METRIC_TIME],
                    metric_key_char_to_metric_type_[
                        static_cast<int>(split[METRIC_TYPE].at(0))],
                    split[METRIC_ACTIVITY]);
 }
 
 }  // namespace performance_monitor