Revert of Replace TabModel with WebStateList in GoogleLandingController.

ios/chrome/browser/ui/ntp/google_landing_controller_unittest.mm

 // Copyright 2013 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.
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "components/search_engines/template_url_service.h"
 #include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
 #include "ios/chrome/browser/search_engines/template_url_service_factory.h"
 #include "ios/chrome/browser/sessions/ios_chrome_tab_restore_service_factory.h"
 #import "ios/chrome/browser/ui/ntp/google_landing_controller.h"
 #import "ios/chrome/browser/ui/ntp/google_landing_mediator.h"
-#include "ios/chrome/browser/web_state_list/fake_web_state_list_delegate.h"
-#include "ios/chrome/browser/web_state_list/web_state_list.h"
 #include "ios/chrome/test/block_cleanup_test.h"
 #include "ios/chrome/test/ios_chrome_scoped_testing_local_state.h"
 #include "ios/web/public/test/test_web_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
@@ skipping 23 matching lines @@
 
     // Set up tab restore service.
     TemplateURLService* template_url_service =
         ios::TemplateURLServiceFactory::GetForBrowserState(
             chrome_browser_state_.get());
     template_url_service->Load();
 
     // Set up stub UrlLoader.
     mockUrlLoader_ = [OCMockObject mockForProtocol:@protocol(UrlLoader)];
     controller_ = [[GoogleLandingController alloc] init];
-    webStateList_ = base::MakeUnique<WebStateList>(&webStateListDelegate_);
     mediator_ = [[GoogleLandingMediator alloc]
           initWithConsumer:controller_
               browserState:chrome_browser_state_.get()
                     loader:(id<UrlLoader>)mockUrlLoader_
                    focuser:nil
         webToolbarDelegate:nil
-              webStateList:webStateList_.get()];
+                  tabModel:nil];
   };
 
   base::MessageLoopForUI message_loop_;
   web::TestWebThread ui_thread_;
   web::TestWebThread io_thread_;
   IOSChromeScopedTestingLocalState local_state_;
   std::unique_ptr<TestChromeBrowserState> chrome_browser_state_;
-  FakeWebStateListDelegate webStateListDelegate_;
-  std::unique_ptr<WebStateList> webStateList_;
   OCMockObject* mockUrlLoader_;
   GoogleLandingMediator* mediator_;
   GoogleLandingController* controller_;
 };
 
 TEST_F(GoogleLandingControllerTest, TestConstructorDestructor) {
   EXPECT_TRUE(controller_);
 }
 
 }  // anonymous namespace