Add skeletons for the factories to create the request coordinator and

components/offline_pages/background/request_coordinator_factory.h

 // Copyright 2015 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.
 
-#ifndef CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_FACTORY_H_
-#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_FACTORY_H_
+#ifndef COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_FACTORY_H_
+#define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_FACTORY_H_
 
 #include "base/macros.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 
 namespace base {
 template <typename T>
 struct DefaultSingletonTraits;
 }  // namespace base
 
 namespace offline_pages {
 
-class OfflinePageModel;
+class RequestCoordinator;
 
-// A factory to create one unique OfflinePageModel.
-class OfflinePageModelFactory : public BrowserContextKeyedServiceFactory {
+// A factory to create one unique RequestCoordinator.
+class RequestCoordinatorFactory : public BrowserContextKeyedServiceFactory {
  public:
-  static OfflinePageModelFactory* GetInstance();
-  static OfflinePageModel* GetForBrowserContext(
+  static RequestCoordinatorFactory* GetInstance();
+  static RequestCoordinator* GetForBrowserContext(
       content::BrowserContext* context);
 
  private:
-  friend struct base::DefaultSingletonTraits<OfflinePageModelFactory>;
+  friend struct base::DefaultSingletonTraits<RequestCoordinatorFactory>;
 
-  OfflinePageModelFactory();
-  ~OfflinePageModelFactory() override {}
+  RequestCoordinatorFactory();
+  ~RequestCoordinatorFactory() override {}
 
   KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* context) const override;
 
   content::BrowserContext* GetBrowserContextToUse(
       content::BrowserContext* context) const override;
 
-  DISALLOW_COPY_AND_ASSIGN(OfflinePageModelFactory);
+  DISALLOW_COPY_AND_ASSIGN(RequestCoordinatorFactory);
 };
 
 }  // namespace offline_pages
 
-#endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_FACTORY_H_
+#endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_FACTORY_H_