Removed IsNativeAppLauncherEnabled() experiment

ios/chrome/browser/tabs/tab.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_TABS_TAB_H_
 #define IOS_CHROME_BROWSER_TABS_TAB_H_
 
 #import <UIKit/UIKit.h>
 
 #include <memory>
 #include <vector>
 
 #import "components/signin/ios/browser/manage_accounts_delegate.h"
 #import "ios/chrome/browser/web/sad_tab_tab_helper_delegate.h"
 #include "ios/net/request_tracker.h"
 #include "ios/web/public/user_agent.h"
 #import "ios/web/public/web_state/ui/crw_web_delegate.h"
 #include "ui/base/page_transition_types.h"
 
 @class AutofillController;
 @class AutoReloadBridge;
 @class CastController;
 @class CRWWebController;
 @class ExternalAppLauncher;
 @class FormInputAccessoryViewController;
 @class FullScreenController;
 @protocol FullScreenControllerDelegate;
 class GURL;
-@class NativeAppNavigationController;
 @class OpenInController;
 @class OverscrollActionsController;
 @protocol OverscrollActionsControllerDelegate;
 @protocol PassKitDialogProvider;
 @class PasswordController;
 @class SnapshotManager;
 @protocol SnapshotOverlayProvider;
 @class FormSuggestionController;
 @protocol TabDelegate;
 @protocol TabDialogDelegate;
@@ skipping 237 matching lines @@
 // When snapshot coalescing is enabled, mutiple calls to generate a snapshot
 // with the same parameters may be coalesced.
 - (void)setSnapshotCoalescingEnabled:(BOOL)snapshotCoalescingEnabled;
 
 // Returns the rect (in |view|'s coordinate space) to include for snapshotting.
 - (CGRect)snapshotContentArea;
 
 // Called when the snapshot of the content will be taken.
 - (void)willUpdateSnapshot;
 
-// Returns the NativeAppNavigationController for this tab.
-- (NativeAppNavigationController*)nativeAppNavigationController;
-
 // Called when this tab is shown.
 - (void)wasShown;
 
 // Called when this tab is hidden.
 - (void)wasHidden;
 
 // Evaluates U2F result.
 - (void)evaluateU2FResultFromURL:(const GURL&)url;
 
 // Cancels prerendering. It is an error to call this on anything except a
 // prerender tab (where |isPrerenderTab| is set to YES).
 - (void)discardPrerender;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_TABS_TAB_H_