Factor Google Now welcome notifications out of DesktopNotificationService.

chrome/browser/notifications/desktop_notification_service.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.
 
 #include "chrome/browser/notifications/desktop_notification_service.h"
 
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 37 matching lines @@
 #endif
 
 using blink::WebTextDirection;
 using content::BrowserThread;
 using content::RenderViewHost;
 using content::WebContents;
 using message_center::NotifierId;
 
 namespace {
 
-const char kChromeNowExtensionID[] = "pafkbggdmjlpgkdkcbjmhmfcdpncadgh";
-
 void CancelNotification(const std::string& id) {
   g_browser_process->notification_ui_manager()->CancelById(id);
 }
 
 }  // namespace
 
 // DesktopNotificationService -------------------------------------------------
 
 // static
 void DesktopNotificationService::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterListPref(
       prefs::kMessageCenterDisabledExtensionIds,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterListPref(
       prefs::kMessageCenterDisabledSystemComponentIds,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
-  ExtensionWelcomeNotification::RegisterProfilePrefs(registry);
 }
 
 // static
 std::string DesktopNotificationService::AddIconNotification(
     const GURL& origin_url,
     const base::string16& title,
     const base::string16& message,
     const gfx::Image& icon,
     const base::string16& replace_id,
     NotificationDelegate* delegate,
@@ skipping 176 matching lines @@
   base::ListValue* const list = update.Get();
   if (add_new_item) {
     // AppendIfNotPresent will delete |adding_value| when the same value
     // already exists.
     list->AppendIfNotPresent(id.release());
   } else {
     list->Remove(*id, NULL);
   }
 }
 
-void DesktopNotificationService::ShowWelcomeNotificationIfNecessary(
-    const Notification& notification) {
-  if (!chrome_now_welcome_notification_) {
-    chrome_now_welcome_notification_ =
-        ExtensionWelcomeNotification::Create(kChromeNowExtensionID, profile_);
-  }
-
-  if (chrome_now_welcome_notification_) {
-    chrome_now_welcome_notification_->ShowWelcomeNotificationIfNecessary(
-        notification);
-  }
-}
-
 void DesktopNotificationService::OnStringListPrefChanged(
     const char* pref_name, std::set<std::string>* ids_field) {
   ids_field->clear();
   // Separate GetPrefs()->GetList() to analyze the crash. See crbug.com/322320
   const PrefService* pref_service = profile_->GetPrefs();
   CHECK(pref_service);
   const base::ListValue* pref_list = pref_service->GetList(pref_name);
   for (size_t i = 0; i < pref_list->GetSize(); ++i) {
     std::string element;
     if (pref_list->GetString(i, &element) && !element.empty())
@@ skipping 65 matching lines @@
   // Tell the IO thread that this extension's permission for notifications
   // has changed.
   extensions::InfoMap* extension_info_map =
       extensions::ExtensionSystem::Get(profile_)->info_map();
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&extensions::InfoMap::SetNotificationsDisabled,
                  extension_info_map, notifier_id.id, !enabled));
 #endif
 }