[Offline pages] Completely remove offliner factory.

components/offline_pages/core/background/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.
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 static_library("background_offliner") {
   sources = [
@@ skipping 12 matching lines @@
     "get_requests_task.h",
     "initialize_store_task.cc",
     "initialize_store_task.h",
     "mark_attempt_aborted_task.cc",
     "mark_attempt_aborted_task.h",
     "mark_attempt_completed_task.cc",
     "mark_attempt_completed_task.h",
     "mark_attempt_started_task.cc",
     "mark_attempt_started_task.h",
     "offliner.h",
-    "offliner_factory.h",
     "offliner_policy.h",
     "offliner_policy_utils.cc",
     "offliner_policy_utils.h",
     "pick_request_task.cc",
     "pick_request_task.h",
     "reconcile_task.cc",
     "reconcile_task.h",
     "remove_requests_task.cc",
     "remove_requests_task.h",
     "request_coordinator.cc",
@@ skipping 23 matching lines @@
     "//sql:sql",
     "//url",
   ]
 }
 
 static_library("test_support") {
   testonly = true
   sources = [
     "network_quality_provider_stub.cc",
     "network_quality_provider_stub.h",
-    "offliner_factory_stub.cc",
-    "offliner_factory_stub.h",
     "offliner_stub.cc",
     "offliner_stub.h",
     "request_queue_in_memory_store.cc",
     "request_queue_in_memory_store.h",
     "scheduler_stub.cc",
     "scheduler_stub.h",
   ]
 
   deps = [
     ":background_offliner",
@@ skipping 27 matching lines @@
     ":background_offliner",
     ":test_support",
     "//base",
     "//base/test:test_support",
     "//components/offline_pages/core",
     "//components/offline_pages/core:switches",
     "//testing/gtest",
     "//url",
   ]
 }