Upstream Chrome on iOS source code [1/11].

ios/chrome/app/app_delegate.h

+// 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.
+
+// ======                        New Architecture                         =====
+// =         This code is only used in the new iOS Chrome architecture.       =
+// ============================================================================
+
+#ifndef IOS_CHROME_APP_APP_DELEGATE_H_
+#define IOS_CHROME_APP_APP_DELEGATE_H_
+
+#import <UIKit/UIKit.h>
+
+// The main delegate of the application.
+// This class is intended solely to handle the numerous UIApplicationDelegate
+// methods and route to other application objects as appropriate. While this
+// object does create and own other objects, including the ApplicationState
+// object, it shouldn't perform significant manipulation or configuration of
+// them. Nor should any of the method implementations in this class contain
+// significant logic or any specific feature support; that should all be
+// implemented in subsidiary objects this class makes use of.
+@interface AppDelegate : NSObject<UIApplicationDelegate>
+// Do not add any public API to this class. Other code in Chrome shouldn't
+// need to access instances of this class for any purpose.
+@end
+
+#endif  // IOS_CHROME_APP_APP_DELEGATE_H_