[ios] Adds a LocationBarController interface.

ios/chrome/browser/ui/omnibox/web_omnibox_edit_controller.h

-// Copyright 2015 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_UI_OMNIBOX_WEB_OMNIBOX_EDIT_CONTROLLER_H_
-#define IOS_CHROME_BROWSER_UI_OMNIBOX_WEB_OMNIBOX_EDIT_CONTROLLER_H_
-
-#include "base/macros.h"
-#include "components/omnibox/browser/omnibox_edit_controller.h"
-
-namespace web {
-class WebState;
-}
-
-// iOS-specific extension of the OmniboxEditController base class.
-class WebOmniboxEditController : public OmniboxEditController {
- public:
-  // Returns the WebState of the currently active tab.
-  virtual web::WebState* GetWebState() = 0;
-
-  // The autocomplete edit lost focus.
-  virtual void OnKillFocus() = 0;
-
-  // The autocomplete got focus.
-  virtual void OnSetFocus() = 0;
-
- protected:
-  WebOmniboxEditController();
-  ~WebOmniboxEditController() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(WebOmniboxEditController);
-};
-
-#endif  // IOS_CHROME_BROWSER_UI_OMNIBOX_WEB_OMNIBOX_EDIT_CONTROLLER_H_