Record metrics for permission prompt acceptance vs. user gesture.

chrome/browser/ui/website_settings/permission_bubble_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/ui/website_settings/permission_bubble_request.h"
 
 #include "ui/gfx/vector_icons_public.h"
 
 gfx::VectorIconId PermissionBubbleRequest::GetVectorIconId() const {
   return gfx::VectorIconId::VECTOR_ICON_NONE;
 }
 
 PermissionBubbleType PermissionBubbleRequest::GetPermissionBubbleType() const {
   return PermissionBubbleType::UNKNOWN;
 }
+
+PermissionBubbleGestureType PermissionBubbleRequest::GetGestureType() const {
+  return PermissionBubbleGestureType::UNKNOWN;
+}