[ios] Change WebStateList serialization method to use SessionWindowIOS.

ios/chrome/browser/ui/main/BUILD.gn

 # Copyright 2016 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.
 
 source_set("main") {
   sources = [
     "browser_view_information.h",
     "browser_view_wrangler.h",
     "browser_view_wrangler.mm",
     "main_coordinator.h",
     "main_coordinator.mm",
     "main_view_controller.h",
     "main_view_controller.mm",
   ]
   deps = [
     "//base",
     "//ios/chrome/browser",
     "//ios/chrome/browser/browser_state",
     "//ios/chrome/browser/browsing_data",
     "//ios/chrome/browser/browsing_data:browsing_data_internal",
     "//ios/chrome/browser/crash_report:crash_report_internal",
     "//ios/chrome/browser/device_sharing",
     "//ios/chrome/browser/physical_web",
     "//ios/chrome/browser/sessions",
+    "//ios/chrome/browser/sessions:serialisation",
     "//ios/chrome/browser/tabs",
     "//ios/chrome/browser/tabs:tabs_internal",
     "//ios/public/provider/chrome/browser",
   ]
   public_deps = [
     "//ios/chrome/browser/ui:ui_internal",
   ]
   libs = [ "UIKit.framework" ]
 }
 
@@ skipping 10 matching lines @@
     "//base",
     "//components/bookmarks/test",
     "//ios/chrome/browser/bookmarks",
     "//ios/chrome/browser/browser_state:test_support",
     "//ios/chrome/browser/tabs",
     "//ios/chrome/browser/ui:ui_internal",
     "//ios/web:test_support",
     "//testing/gtest",
   ]
 }