Remove Profile-keyed factory boilerplate: cookies, managed_mode & web_navigation

chrome/browser/extensions/api/web_navigation/web_navigation_api.cc

 // 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.
 
 // Implements the Chrome Extensions WebNavigation API.
 
 #include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
 
 #include "base/lazy_instance.h"
 #include "chrome/browser/extensions/api/web_navigation/web_navigation_api_constants.h"
@@ skipping 750 matching lines @@
 void WebNavigationAPI::Shutdown() {
   ExtensionSystem::Get(profile_)->event_router()->UnregisterObserver(this);
 }
 
 void WebNavigationAPI::OnListenerAdded(
     const extensions::EventListenerInfo& details) {
   web_navigation_event_router_.reset(new WebNavigationEventRouter(profile_));
   ExtensionSystem::Get(profile_)->event_router()->UnregisterObserver(this);
 }
 
+static base::LazyInstance<ProfileKeyedAPIFactory<WebNavigationAPI> >
+g_factory = LAZY_INSTANCE_INITIALIZER;
+
+template <>
+ProfileKeyedAPIFactory<WebNavigationAPI>*
+ProfileKeyedAPIFactory<WebNavigationAPI>::GetInstance() {
+  return &g_factory.Get();
+}
+
 }  // namespace extensions