[ios] WebStateList owns all WebState it manages.

ios/chrome/browser/ui/contextual_search/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.
 
 import("//ios/web/js_compile.gni")
 
 bundle_data("resources") {
   sources = [
     "resources/expand_less.png",
     "resources/expand_less@2x.png",
@@ skipping 73 matching lines @@
     "//ios/chrome/browser/tabs",
     "//ios/chrome/browser/ui",
     "//ios/chrome/browser/ui/colors",
     "//ios/chrome/browser/ui/commands",
     "//ios/chrome/browser/ui/contextual_search/protos",
     "//ios/chrome/browser/ui/util",
     "//ios/chrome/browser/web",
     "//ios/chrome/common",
     "//ios/public/provider/chrome/browser",
     "//ios/public/provider/chrome/browser/images",
+    "//ios/shared/chrome/browser/tabs",
     "//ios/third_party/material_components_ios",
     "//ios/third_party/material_roboto_font_loader_ios",
     "//ios/web",
     "//net",
     "//ui/base",
     "//url",
   ]
   libs = [ "UIKit.framework" ]
 }
 
@@ skipping 29 matching lines @@
     "//ios/chrome/browser/sync",
     "//ios/chrome/browser/sync:test_support",
     "//ios/chrome/browser/web:test_support",
     "//ios/web",
     "//ios/web:test_support",
     "//net",
     "//testing/gtest",
     "//third_party/ocmock",
   ]
 }