[CRD iOS] Branching internal and external implementations

remoting/ios/app/remoting_resource_factory.h

+// Copyright 2017 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 REMOTING_IOS_APP_REMOTING_RESOURCE_FACTORY_H_
+#define REMOTING_IOS_APP_REMOTING_RESOURCE_FACTORY_H_
+
+#import <UIKit/UIKit.h>
+
+// The base class for holding resources that have different internal and
+// external implementation.
+@interface RemotingResourceFactory : NSObject
+
+// Used by AppDelegate to wrap the root view controller. Implementation can wrap
+// the root view controller into a PanelViewController.
+- (UIViewController*)wrapRootViewController:(UIViewController*)controller;
+
+// Presents the side menu on the host list view.
+- (void)presentMenuOnController:(UIViewController*)controller;
+
+// The default factory must be set right after the app is loaded.
+@property(class, strong, nonatomic) RemotingResourceFactory* defaultFactory;
+
+@end
+
+#endif  // REMOTING_IOS_APP_REMOTING_RESOURCE_FACTORY_H_