Delay updating jumplist to avoid blocking the file thread at start-up

chrome/browser/ui/views/load_complete_listener.cc

Index: chrome/browser/ui/views/load_complete_listener.cc
diff --git a/chrome/browser/ui/views/load_complete_listener.cc b/chrome/browser/ui/views/load_complete_listener.cc
new file mode 100644
index 0000000000000000000000000000000000000000..030aa47eaf066f54315f15ee26e07b152202988d
--- /dev/null
+++ b/chrome/browser/ui/views/load_complete_listener.cc
@@ -0,0 +1,38 @@
+// 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.
+
+#include "chrome/browser/ui/views/load_complete_listener.h"
+
+#include "chrome/common/chrome_notification_types.h"
+#include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_source.h"
+#include "content/public/browser/notification_types.h"
+
+LoadCompleteListener::LoadCompleteListener(Delegate* delegate)
+    : delegate_(delegate) {
+  registrar_ = new content::NotificationRegistrar();
+  // Register for notification of when initial page load is complete to ensure
+  // that we wait until start-up is complete before calling the callback.
+  registrar_->Add(this, content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
+                  content::NotificationService::AllSources());
+}
+
+LoadCompleteListener::~LoadCompleteListener() {
+}
+
+void LoadCompleteListener::Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) {
+  switch (type) {
+    case content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME: {
+      delegate_->OnLoadCompleted();
+      registrar_->Remove(this, content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
+                         content::NotificationService::AllSources());
+      break;
+    }
+    default:
+      NOTREACHED() << "Unexpected notification type.";
+  }
+}