Implement basic mojo Permission service and use it for Geolocation.

content/common/geolocation_messages.h

-// Copyright (c) 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.
-
-// IPC messages for geolocation.
-// Multiply-included message file, hence no include guard.
-
-#include "content/public/common/geoposition.h"
-#include "ipc/ipc_message_macros.h"
-#include "url/gurl.h"
-
-#define IPC_MESSAGE_START GeolocationMsgStart
-
-IPC_ENUM_TRAITS_MAX_VALUE(content::Geoposition::ErrorCode,
-                          content::Geoposition::ERROR_CODE_LAST)
-
-IPC_STRUCT_TRAITS_BEGIN(content::Geoposition)
-  IPC_STRUCT_TRAITS_MEMBER(latitude)
-  IPC_STRUCT_TRAITS_MEMBER(longitude)
-  IPC_STRUCT_TRAITS_MEMBER(altitude)
-  IPC_STRUCT_TRAITS_MEMBER(accuracy)
-  IPC_STRUCT_TRAITS_MEMBER(altitude_accuracy)
-  IPC_STRUCT_TRAITS_MEMBER(heading)
-  IPC_STRUCT_TRAITS_MEMBER(speed)
-  IPC_STRUCT_TRAITS_MEMBER(timestamp)
-  IPC_STRUCT_TRAITS_MEMBER(error_code)
-  IPC_STRUCT_TRAITS_MEMBER(error_message)
-IPC_STRUCT_TRAITS_END()
-
-// Messages sent from the browser to the renderer.
-
-// Reply in response to GeolocationHostMsg_RequestPermission.
-IPC_MESSAGE_ROUTED2(GeolocationMsg_PermissionSet,
-                    int /* bridge_id */,
-                    bool /* is_allowed */)
-
-// Messages sent from the renderer to the browser.
-
-// The |bridge_id| representing |host| is requesting permission to access
-// geolocation position. This will be replied by GeolocationMsg_PermissionSet.
-// TODO(mlamouri): |origin| should be a security origin to guarantee that a
-// proper origin is passed.
-IPC_MESSAGE_ROUTED3(GeolocationHostMsg_RequestPermission,
-                     int /* bridge_id */,
-                     GURL /* origin in the frame requesting geolocation */,
-                     bool /* user_gesture */)