[ios] Switches ToolbarModelDelegateIOS to use WebStateList.

ios/chrome/browser/ui/browser_view_controller.mm

 // 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.
 
 #import "ios/chrome/browser/ui/browser_view_controller.h"
 
 #import <AssetsLibrary/AssetsLibrary.h>
 #import <MobileCoreServices/MobileCoreServices.h>
 #import <PassKit/PassKit.h>
 #import <Photos/Photos.h>
@@ skipping 1701 matching lines @@
   DCHECK([self isViewLoaded]);
   DCHECK(!_toolbarModelDelegate);
 
   // Create the preload controller before the toolbar controller.
   if (!_preloadController) {
     _preloadController.reset([_dependencyFactory newPreloadController]);
     [_preloadController setDelegate:self];
   }
 
   // Create the toolbar model and controller.
-  _toolbarModelDelegate.reset(new ToolbarModelDelegateIOS(_model));
+  _toolbarModelDelegate.reset(
+      new ToolbarModelDelegateIOS([_model webStateList]));
   _toolbarModelIOS.reset([_dependencyFactory
       newToolbarModelIOSWithDelegate:_toolbarModelDelegate.get()]);
   _toolbarController.reset([_dependencyFactory
       newWebToolbarControllerWithDelegate:self
                                 urlLoader:self
                           preloadProvider:_preloadController.get()]);
   [_toolbarController setTabCount:[_model count]];
   if (_voiceSearchController.get())
     _voiceSearchController->SetDelegate(_toolbarController);
 
@@ skipping 3384 matching lines @@
 
 - (UIView*)voiceSearchButton {
   return _voiceSearchButton;
 }
 
 - (id<LogoAnimationControllerOwner>)logoAnimationControllerOwner {
   return [self currentLogoAnimationControllerOwner];
 }
 
 @end