[Offline pages] Completely remove offliner factory.

chrome/browser/android/offline_pages/background_loader_offliner_factory.cc

-// 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.
-
-#include "chrome/browser/android/offline_pages/background_loader_offliner_factory.h"
-
-#include "chrome/browser/android/offline_pages/background_loader_offliner.h"
-#include "chrome/browser/android/offline_pages/offline_page_model_factory.h"
-
-namespace offline_pages {
-
-class OfflinerPolicy;
-
-BackgroundLoaderOfflinerFactory::BackgroundLoaderOfflinerFactory(
-    content::BrowserContext* context) {
-  offliner_ = nullptr;
-  context_ = context;
-}
-
-BackgroundLoaderOfflinerFactory::~BackgroundLoaderOfflinerFactory() {
-  delete offliner_;
-}
-
-Offliner* BackgroundLoaderOfflinerFactory::GetOffliner(
-    const OfflinerPolicy* policy) {
-  if (offliner_ == nullptr) {
-    OfflinePageModel* model =
-        OfflinePageModelFactory::GetInstance()->GetForBrowserContext(context_);
-
-    offliner_ = new BackgroundLoaderOffliner(context_, policy, model);
-  }
-
-  return offliner_;
-}
-
-} // namespace offline_pages