[ios] Add session saving support to clean skeleton.

ios/chrome/browser/browser_state/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("browser_state") {
   sources = [
     "browser_state_otr_helper.cc",
     "browser_state_otr_helper.h",
     "chrome_browser_state.h",
     "chrome_browser_state.mm",
@@ skipping 88 matching lines @@
     "//ios/chrome/browser/sessions",
     "//ios/chrome/browser/signin",
     "//ios/chrome/browser/suggestions",
     "//ios/chrome/browser/sync",
     "//ios/chrome/browser/sync/glue",
     "//ios/chrome/browser/translate",
     "//ios/chrome/browser/undo",
     "//ios/net",
     "//ios/public/provider/chrome/browser",
     "//ios/public/provider/chrome/browser/signin",
+    "//ios/shared/chrome/browser/ui/browser_list",
     "//ios/web",
     "//net",
     "//net:extras",
   ]
   allow_circular_includes_from = [
     "//ios/chrome/browser",
     "//ios/chrome/browser/browser_state_metrics",
     "//ios/chrome/browser/net",
     "//ios/chrome/browser/prefs:browser_prefs",
     "//ios/chrome/browser/signin",
@@ skipping 36 matching lines @@
     "//ios/chrome/browser/sync/glue",
     "//ios/chrome/test:test_support",
     "//ios/public/provider/chrome/browser",
     "//ios/public/provider/chrome/browser/ui",
     "//ios/web",
     "//net:test_support",
   ]
 
   configs += [ "//build/config/compiler:enable_arc" ]
 }