Add FakeAffiliationFetcher and factory.

components/password_manager/core/browser/BUILD.gn

 # Copyright 2014 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("//third_party/protobuf/proto_library.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
 }
 
@@ skipping 100 matching lines @@
 
 proto_library("proto") {
   sources = [
     "affiliation_api.proto",
   ]
 }
 
 source_set("test_support") {
   testonly = true
   sources = [
+    "fake_affiliation_fetcher.cc",
+    "fake_affiliation_fetcher.h",
     "mock_password_store.cc",
     "mock_password_store.h",
     "password_form_data.cc",
     "password_form_data.h",
     "stub_password_manager_client.cc",
     "stub_password_manager_client.h",
     "stub_password_manager_driver.cc",
     "stub_password_manager_driver.h",
     "test_password_store.cc",
     "test_password_store.h",
   ]
 
   public_deps = [
     ":browser",
   ]
   deps = [
     "//base",
     "//components/autofill/core/common",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }