[ios] Move WebStateList to ios/chrome/browser/web_state_list.

ios/shared/chrome/browser/tabs/fake_web_state_list_delegate.mm

Index: ios/shared/chrome/browser/tabs/fake_web_state_list_delegate.mm
diff --git a/ios/shared/chrome/browser/tabs/fake_web_state_list_delegate.mm b/ios/shared/chrome/browser/tabs/fake_web_state_list_delegate.mm
deleted file mode 100644
index 2a3e992c9f47f1e05a807ab3fd488e1848fca4bd..0000000000000000000000000000000000000000
--- a/ios/shared/chrome/browser/tabs/fake_web_state_list_delegate.mm
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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.
-
-#import "ios/shared/chrome/browser/tabs/fake_web_state_list_delegate.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-FakeWebStateListDelegate::FakeWebStateListDelegate() = default;
-
-FakeWebStateListDelegate::~FakeWebStateListDelegate() = default;
-
-void FakeWebStateListDelegate::WillAddWebState(web::WebState* web_state) {}
-
-void FakeWebStateListDelegate::WebStateDetached(web::WebState* web_state) {}