[ios] Move WebStateList to ios/chrome/browser/web_state_list.

ios/clean/chrome/browser/ui/omnibox/BUILD.gn

 # Copyright 2017 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("omnibox") {
   sources = [
     "location_bar_coordinator.h",
     "location_bar_coordinator.mm",
     "location_bar_mediator.h",
     "location_bar_mediator.mm",
   ]
   deps = [
     ":omnibox_ui",
     "//base",
     "//components/toolbar",
     "//ios/chrome/browser/ssl",
     "//ios/chrome/browser/ui/omnibox:omnibox_internal",
     "//ios/chrome/browser/ui/toolbar",
+    "//ios/chrome/browser/web_state_list",
     "//ios/clean/chrome/browser",
-    "//ios/shared/chrome/browser/tabs",
     "//ios/shared/chrome/browser/ui/browser_list",
     "//ios/shared/chrome/browser/ui/coordinators",
     "//ios/shared/chrome/browser/ui/omnibox",
     "//ios/web",
   ]
   configs += [ "//build/config/compiler:enable_arc" ]
 }
 
 source_set("omnibox_ui") {
   sources = [
@@ skipping 12 matching lines @@
     "location_bar_coordinator_unittest.mm",
     "location_bar_mediator_unittest.mm",
   ]
 
   deps = [
     ":omnibox",
     "//testing/gtest",
   ]
   configs += [ "//build/config/compiler:enable_arc" ]
 }