chrome: Cleanup class/struct forward declarations

chrome/browser/permissions/permission_prompt_android.h

 // Copyright 2016 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 CHROME_BROWSER_PERMISSIONS_PERMISSION_PROMPT_ANDROID_H_
 #define CHROME_BROWSER_PERMISSIONS_PERMISSION_PROMPT_ANDROID_H_
 
 #include "chrome/browser/ui/website_settings/permission_prompt.h"
 
-class GroupedPermissionInfoBarDelegate;
 class InfoBarService;
 
 namespace content {
 class WebContents;
 }
 
 namespace infobars {
 class InfoBar;
 }
 
@@ skipping 25 matching lines @@
   // |delegate_| is the PermissionRequestManager, which owns this object.
   Delegate* delegate_;
   // |infobar_| is owned by the InfoBarService; we keep a pointer here so we can
   // ask the service to remove the infobar after it is added.
   infobars::InfoBar* infobar_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionPromptAndroid);
 };
 
 #endif  // CHROME_BROWSER_PERMISSIONS_PERMISSION_PROMPT_ANDROID_H_