Move OnKillFocus() from OmniboxEditController to WebOmniboxEditController

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;
 
+  virtual void OnKillFocus() = 0;
+
  protected:
   WebOmniboxEditController();
   ~WebOmniboxEditController() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebOmniboxEditController);
 };
 
 #endif  // IOS_CHROME_BROWSER_UI_OMNIBOX_WEB_OMNIBOX_EDIT_CONTROLLER_H_