Split up ios/web:test_support.

ios/chrome/browser/ui/reading_list/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("reading_list") {
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "number_badge_view.h",
     "number_badge_view.mm",
     "offline_page_native_content.h",
@@ skipping 80 matching lines @@
     "//components/prefs",
     "//components/reading_list/core",
     "//components/url_formatter",
     "//ios/chrome/browser/browser_state:test_support",
     "//ios/chrome/browser/favicon",
     "//ios/chrome/browser/reading_list",
     "//ios/chrome/browser/tabs",
     "//ios/chrome/browser/ui",
     "//ios/chrome/browser/ui/static_content",
     "//ios/web",
-    "//ios/web:test_support",
+    "//ios/web/public/test:test_support",
     "//testing/gtest",
     "//third_party/ocmock",
     "//ui/base",
   ]
 }
 
 source_set("eg_tests") {
   configs += [ "//build/config/compiler:enable_arc" ]
   testonly = true
   sources = [
@@ skipping 10 matching lines @@
     "//ios/chrome/browser/ui:ui",
     "//ios/chrome/browser/ui/commands",
     "//ios/chrome/test/app:test_support",
     "//ios/chrome/test/earl_grey:test_support",
     "//ios/testing:ios_test_support",
     "//ios/testing/earl_grey:earl_grey_support",
     "//ios/third_party/earl_grey",
     "//ios/third_party/material_components_ios",
     "//ios/web",
     "//ios/web:reload_type",
-    "//ios/web:test_support",
+    "//ios/web/public/test:test_support",
+    "//ios/web/public/test/response_providers:test_support",
     "//net",
   ]
   libs = [
     "UIKit.framework",
     "XCTest.framework",
   ]
 }
 
 bundle_data("resources") {
   sources = [
@@ skipping 13 matching lines @@
     "resources/reading_list_side_swipe@2x.png",
     "resources/reading_list_side_swipe@3x.png",
     "resources/reading_list_toolbar_icon.png",
     "resources/reading_list_toolbar_icon@2x.png",
     "resources/reading_list_toolbar_icon@3x.png",
   ]
   outputs = [
     "{{bundle_resources_dir}}/{{source_file_part}}",
   ]
 }