Add a feature-controlled persistence checkbox to geolocation prompts on desktop Views platforms.

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"
 
 #include "ui/gfx/vector_icons_public.h"
 
+PermissionRequest::PermissionRequest() : persist_(true) {}
+
 gfx::VectorIconId PermissionRequest::GetVectorIconId() const {
   return gfx::VectorIconId::VECTOR_ICON_NONE;
 }
 
+bool PermissionRequest::ShouldShowPersistenceToggle() const {
+  return false;
+}
+
 PermissionRequestType PermissionRequest::GetPermissionRequestType() const {
   return PermissionRequestType::UNKNOWN;
 }
 
 PermissionRequestGestureType PermissionRequest::GetGestureType() const {
   return PermissionRequestGestureType::UNKNOWN;
 }