Removing iPad Tab Switcher experimental flag.

ios/chrome/browser/ui/browser_view_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_UI_BROWSER_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_UI_BROWSER_VIEW_CONTROLLER_H_
 
 #import <MessageUI/MessageUI.h>
 #import <StoreKit/StoreKit.h>
 #import <UIKit/UIKit.h>
@@ skipping 59 matching lines @@
                          bundle:(NSBundle*)nibBundleOrNil NS_UNAVAILABLE;
 
 - (instancetype)initWithCoder:(NSCoder*)aDecoder NS_UNAVAILABLE;
 
 // The top-level browser container view.
 @property(nonatomic, retain) BrowserContainerView* contentArea;
 
 // Invisible button used to dismiss the keyboard.
 @property(nonatomic, retain) UIButton* typingShield;
 
-// Valid only for tablet. YES if the tab strip will display the mode toggle
-// switch. May be set to the same value repeatedly with no layout penalty
-// (guaranteed by the tab strip).
-@property(nonatomic, assign) BOOL hasModeToggleSwitch;
-
 // Activates/deactivates the object. This will enable/disable the ability for
 // this object to browse, and to have live UIWebViews associated with it. While
 // not active, the UI will not react to changes in the tab model, so generally
 // an inactive BVC should not be visible.
 @property(nonatomic, assign, getter=isActive) BOOL active;
 
 // Returns whether or not text to speech is playing.
 @property(nonatomic, assign, readonly, getter=isPlayingTTS) BOOL playingTTS;
 
 // Returns the TabModel passed to the initializer.
@@ skipping 58 matching lines @@
 
 // Removes files received from other applications. If |immediately| is YES,
 // initiates the removal of files immediately. |completionHandler| is called
 // when files have been removed.
 - (void)removeExternalFilesImmediately:(BOOL)immediately
                      completionHandler:(ProceduralBlock)completionHandler;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_BROWSER_VIEW_CONTROLLER_H_