reorg: move JS ops implementations to cli/js/ops/, part 2 (#4283)

Following JS ops were moved to separate files in cli/js/ops directory:
- io
- process
- worker_host
- web_worker
- plugins
- timers
- signal
- permissions

cli/js/ops/permissions.ts

@@ -0,0 +1,24 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { sendSync } from "./dispatch_json.ts";
+
+// TODO(bartlomieju): duplicated in `cli/js/permissions.ts` as
+// `PermissionState
+export type PermissionResponse = "granted" | "denied" | "prompt";
+
+interface PermissionRequest {
+  name: string;
+  url?: string;
+  path?: string;
+}
+
+export function query(desc: PermissionRequest): PermissionResponse {
+  return sendSync("op_query_permission", desc).state;
+}
+
+export function revoke(desc: PermissionRequest): PermissionResponse {
+  return sendSync("op_revoke_permission", desc).state;
+}
+
+export function request(desc: PermissionRequest): PermissionResponse {
+  return sendSync("op_request_permission", desc).state;
+}