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

ios/chrome/browser/web_state_list/fake_web_state_list_delegate.h

Index: ios/chrome/browser/web_state_list/fake_web_state_list_delegate.h
diff --git a/ios/chrome/browser/web_state_list/fake_web_state_list_delegate.h b/ios/chrome/browser/web_state_list/fake_web_state_list_delegate.h
deleted file mode 100644
index fb4f578e2135ff4621fdc1bf2abee4ac8d67369f..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/web_state_list/fake_web_state_list_delegate.h
+++ /dev/null
@@ -1,25 +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.
-
-#ifndef IOS_CHROME_BROWSER_WEB_STATE_LIST_FAKE_WEB_STATE_LIST_DELEGATE_H_
-#define IOS_CHROME_BROWSER_WEB_STATE_LIST_FAKE_WEB_STATE_LIST_DELEGATE_H_
-
-#include "base/macros.h"
-#import "ios/chrome/browser/web_state_list/web_state_list_delegate.h"
-
-// Fake WebStateList delegate for tests.
-class FakeWebStateListDelegate : public WebStateListDelegate {
- public:
-  FakeWebStateListDelegate();
-  ~FakeWebStateListDelegate() override;
-
-  // WebStateListDelegate implementation.
-  void WillAddWebState(web::WebState* web_state) override;
-  void WebStateDetached(web::WebState* web_state) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(FakeWebStateListDelegate);
-};
-
-#endif  // IOS_CHROME_BROWSER_WEB_STATE_LIST_FAKE_WEB_STATE_LIST_DELEGATE_H_