Revert of [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
new file mode 100644
index 0000000000000000000000000000000000000000..2a3e992c9f47f1e05a807ab3fd488e1848fca4bd
--- /dev/null
+++ b/ios/shared/chrome/browser/tabs/fake_web_state_list_delegate.mm
@@ -0,0 +1,17 @@
+// 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) {}