Log site engagement scores for permission actions

chrome/browser/permissions/permission_request.cc

 // 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.
 
 #include "chrome/browser/permissions/permission_request.h"
 
 
 PermissionRequest::PermissionRequest() : persist_(true) {}
 
 bool PermissionRequest::ShouldShowPersistenceToggle() const {
   return false;
 }
 
-PermissionRequestType PermissionRequest::GetPermissionRequestType() const {
-  return PermissionRequestType::UNKNOWN;
-}
-
 PermissionRequestGestureType PermissionRequest::GetGestureType() const {
   return PermissionRequestGestureType::UNKNOWN;
 }
 
 ContentSettingsType PermissionRequest::GetContentSettingsType() const {
   return CONTENT_SETTINGS_TYPE_DEFAULT;
 }