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

ash/display/display_manager.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 "ash/display/display_manager.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_switches.h"
 #include "ash/display/display_controller.h"
 #include "ash/host/root_window_host_factory.h"
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
-#include "base/string_split.h"
 #include "base/stringprintf.h"
+#include "base/strings/string_split.h"
 #include "base/utf_string_conversions.h"
 #include "grit/ash_strings.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/root_window_host.h"
 #include "ui/aura/window_property.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/rect.h"
@@ skipping 556 matching lines @@
   // to change there.
   if (DisplayController::HasPrimaryDisplay()  &&
       display_info.id() == DisplayController::GetPrimaryDisplay().id()) {
     new_display.set_bounds(gfx::Rect(new_display.bounds().size()));
   }
   return new_display;
 }
 
 }  // namespace internal
 }  // namespace ash