src/: Update the remaining include paths of string_split.h to its new location.

tools/android/device_stats_monitor/device_stats_monitor.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.
 
 // Dumps CPU and IO stats to a file at a regular interval.
 //
 // Output may be post processed by host to get top/iotop style information.
 
 #include <signal.h>
 #include <unistd.h>
 
 #include <fstream>
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
-#include "base/string_split.h"
+#include "base/strings/string_split.h"
 
 namespace {
 
 const char kIOStatsPath[] = "/proc/diskstats";
 const char kCPUStatsPath[] = "/proc/stat";
 
 class DeviceStatsMonitor {
  public:
   explicit DeviceStatsMonitor(const std::string& out_path)
       : out_path_(out_path),
@@ skipping 70 matching lines @@
       kDefaultHz;
 
   printf("Starting device stats monitor\n");
   g_device_stats_monitor = new DeviceStatsMonitor(args[0]);
   signal(SIGTERM, SigTermHandler);
   g_device_stats_monitor->Start(hz);
   delete g_device_stats_monitor;
 
   return 0;
 }