Replace TabModel with WebStateList in GoogleLandingController.

ios/chrome/browser/ui/ntp/google_landing_consumer.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 IOS_CHROME_BROWSER_UI_NTP_GOOGLE_LANDING_CONSUMER_H_
 #define IOS_CHROME_BROWSER_UI_NTP_GOOGLE_LANDING_CONSUMER_H_
 
 #import <Foundation/Foundation.h>
 
 #include "ios/public/provider/chrome/browser/ui/logo_vendor.h"
 
 // Handles google landing controller update notifications.
 @protocol GoogleLandingConsumer<NSObject>
 
 // Whether the Google logo or doodle is being shown.
 @property(nonatomic, assign) BOOL showLogo;
 
 // Exposes view and methods to drive the doodle.
 @property(nonatomic, assign) id<LogoVendor> logoVendor;
 
 // |YES| if this consumer is incognito.
 @property(nonatomic, assign) BOOL offTheRecord;
 
 // |YES| if this consumer is has voice search enabled.
 @property(nonatomic, assign) BOOL voiceSearchEnabled;
 
+// The number of tabs to show in the google landing fake toolbar.
+@property(nonatomic, assign) int tabCount;
+
 // Tells the consumer to that most visited data updated.
 - (void)mostVisitedDataUpdated;
 
 // Tells the consumer a most visited icon was updated.
 - (void)mostVisitedIconMadeAvailableAtIndex:(NSUInteger)index;
 
 // The location bar has lost focus.
 - (void)locationBarResignsFirstResponder;
 
 // Tell location bar has taken focus.
 - (void)locationBarBecomesFirstResponder;
 
 // Asks the consumer to execute a chrome command.
 - (void)chromeExecuteCommand:(id)sender;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_NTP_GOOGLE_LANDING_CONSUMER_H_