Fixit: Cleanup of InfoBarController.

ios/chrome/browser/infobars/infobar.h

 // Copyright 2012 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_INFOBARS_INFOBAR_H_
 #define IOS_CHROME_BROWSER_INFOBARS_INFOBAR_H_
 
 #include "base/mac/scoped_nsobject.h"
 #include "components/infobars/core/infobar.h"
-#include "components/infobars/core/infobar_delegate.h"
-#include "ios/chrome/browser/infobars/infobar_controller.h"
 #import "ios/public/provider/chrome/browser/ui/infobar_view_delegate.h"
 
+@class InfoBarController;
+@class UIView;
+namespace infobars {
+class InfoBarDelegate;
+}
+
 // InfoBar for iOS acts as a UIViewController for InfoBarView.
 class InfoBarIOS : public infobars::InfoBar, public InfoBarViewDelegate {
  public:
   explicit InfoBarIOS(scoped_ptr<infobars::InfoBarDelegate> delegate);
   ~InfoBarIOS() override;
 
   // Layouts the infobar using data from delegate and prepare it for adding to
   // superview.
   void Layout(CGRect container_bounds);
 
@@ skipping 13 matching lines @@
   // InfoBarViewDelegate:
   void SetInfoBarTargetHeight(int height) override;
   void InfoBarDidCancel() override;
   void InfoBarButtonDidPress(NSUInteger button_id) override;
 
   base::scoped_nsobject<InfoBarController> controller_;
   DISALLOW_COPY_AND_ASSIGN(InfoBarIOS);
 };
 
 #endif  // IOS_CHROME_BROWSER_INFOBARS_INFOBAR_H_