[ios] Change WebStateList serialization method to use SessionWindowIOS.

ios/chrome/browser/browsing_data/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("browsing_data") {
   sources = [
     "browsing_data_change_listening.h",
     "browsing_data_counter_wrapper.cc",
     "browsing_data_counter_wrapper.h",
     "browsing_data_remover_helper.cc",
@@ skipping 16 matching lines @@
     "//components/password_manager/core/browser",
     "//components/prefs",
     "//components/sessions",
     "//ios/chrome/browser",
     "//ios/chrome/browser/autofill",
     "//ios/chrome/browser/browser_state",
     "//ios/chrome/browser/history",
     "//ios/chrome/browser/passwords",
     "//ios/chrome/browser/search_engines",
     "//ios/chrome/browser/sessions",
+    "//ios/chrome/browser/sessions:serialisation",
     "//ios/chrome/browser/signin",
     "//ios/chrome/browser/sync",
     "//ios/net",
     "//ios/public/provider/chrome/browser",
     "//ios/web",
     "//net",
     "//url",
   ]
   public_deps = [
     "//components/search_engines",
@@ skipping 33 matching lines @@
   ]
   deps = [
     ":browsing_data",
     "//base",
     "//components/browsing_data/core",
     "//components/open_from_clipboard",
     "//components/signin/ios/browser",
     "//ios/chrome/browser:browser_internal",
     "//ios/chrome/browser/browser_state",
     "//ios/chrome/browser/native_app_launcher:native_app_launcher_internal",
-    "//ios/chrome/browser/sessions",
+    "//ios/chrome/browser/sessions:serialisation",
     "//ios/chrome/browser/signin",
     "//ios/chrome/browser/snapshots",
     "//ios/chrome/browser/ui:ui_internal",
     "//ios/public/provider/chrome/browser",
     "//ios/public/provider/chrome/browser/native_app_launcher",
     "//ios/web",
     "//net",
   ]
   libs = [ "WebKit.framework" ]
 }