[extension SW] Support lazy events from extension service workers.

extensions/browser/lazy_context_id.cc

 // Copyright 2017 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 "extensions/browser/lazy_context_id.h"
 
 #include "extensions/browser/lazy_background_task_queue.h"
+#include "extensions/browser/service_worker_task_queue.h"
 
 namespace extensions {
 
 LazyContextId::LazyContextId(content::BrowserContext* context,
                              const ExtensionId& extension_id)
     : type_(Type::kEventPage), context_(context), extension_id_(extension_id) {}
 
-LazyBackgroundTaskQueue* LazyContextId::GetTaskQueue() {
-  DCHECK(is_for_event_page());
-  return LazyBackgroundTaskQueue::Get(context_);
+LazyContextId::LazyContextId(content::BrowserContext* context,
+                             const ExtensionId& extension_id,
+                             const GURL& service_worker_scope)
+    : type_(Type::kServiceWorker),
+      context_(context),
+      extension_id_(extension_id),
+      service_worker_scope_(service_worker_scope) {}
+
+LazyContextTaskQueue* LazyContextId::GetTaskQueue() {
+  if (is_for_event_page())
+    return LazyBackgroundTaskQueue::Get(context_);
+  DCHECK(is_for_service_worker());
+  return ServiceWorkerTaskQueue::Get(context_);
 }
 
 }  // namespace extensions