Split up ios/web:test_support.

ios/chrome/browser/tabs/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("tabs") {
   sources = [
     "legacy_tab_helper.h",
     "tab.h",
     "tab_delegate.h",
     "tab_dialog_delegate.h",
@@ skipping 151 matching lines @@
     "//ios/chrome/browser/sessions:test_support",
     "//ios/chrome/browser/ui:ui_internal",
     "//ios/chrome/browser/web:web_internal",
     "//ios/chrome/browser/web_state_list",
     "//ios/chrome/test:test_support",
     "//ios/public/provider/chrome/browser",
     "//ios/public/provider/chrome/browser:test_support",
     "//ios/public/provider/chrome/browser/native_app_launcher:test_support",
     "//ios/testing:ocmock_support",
     "//ios/web",
-    "//ios/web:test_support",
+    "//ios/web/public/test:test_support",
     "//net",
     "//testing/gtest",
     "//third_party/ocmock",
   ]
 }
 
 source_set("unit_tests_arc") {
   testonly = true
   sources = [
     "tab_model_list_unittest.mm",
   ]
   deps = [
     ":tabs",
     ":tabs_internal",
     "//base",
     "//ios/chrome/browser/browser_state:test_support",
     "//ios/chrome/browser/sessions:test_support",
-    "//ios/web:test_support",
+    "//ios/web/public/test:test_support",
     "//testing/gtest",
   ]
   configs += [ "//build/config/compiler:enable_arc" ]
 }