Removed NativeAppNavigationController and related code

ios/chrome/browser/native_app_launcher/native_app_navigation_controller.h

-// Copyright 2012 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 IOS_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_NAVIGATION_CONTROLLER_H_
-#define IOS_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_NAVIGATION_CONTROLLER_H_
-
-#import <Foundation/Foundation.h>
-
-namespace web {
-class WebState;
-}  // namespace web
-
-// NativeAppNavigationController brings up a GAL Infobar if the webpage directs
-// it to do so and there are no other circumstances that would suppress its
-// display.
-@interface NativeAppNavigationController : NSObject
-
-- (instancetype)initWithWebState:(web::WebState*)webState
-    NS_DESIGNATED_INITIALIZER;
-
-- (instancetype)init NS_UNAVAILABLE;
-
-// Copies the list of applications possibly being installed and register to be
-// notified of their installation.
-- (void)copyStateFrom:(NativeAppNavigationController*)controller;
-@end
-
-#endif  // IOS_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_NAVIGATION_CONTROLLER_H_