Remove GoogleNowNotification stats collector

chrome/browser/notifications/message_center_notification_manager.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/message_center_notification_manager.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/logging.h"
@@ skipping 28 matching lines @@
 #endif
 
 using message_center::NotifierId;
 
 MessageCenterNotificationManager::MessageCenterNotificationManager(
     message_center::MessageCenter* message_center,
     std::unique_ptr<message_center::NotifierSettingsProvider> settings_provider)
     : message_center_(message_center),
       settings_provider_(std::move(settings_provider)),
       system_observer_(this),
-      stats_collector_(message_center),
-      google_now_stats_collector_(message_center) {
+      stats_collector_(message_center) {
   message_center_->AddObserver(this);
   message_center_->SetNotifierSettingsProvider(settings_provider_.get());
 
 #if defined(OS_CHROMEOS)
   blockers_.push_back(
       base::MakeUnique<LoginStateNotificationBlockerChromeOS>(message_center));
 #else
   blockers_.push_back(
       base::MakeUnique<ScreenLockNotificationBlocker>(message_center));
 #endif
@@ skipping 275 matching lines @@
 }
 
 ProfileNotification* MessageCenterNotificationManager::FindProfileNotification(
     const std::string& id) const {
   auto iter = profile_notifications_.find(id);
   if (iter == profile_notifications_.end())
     return nullptr;
 
   return (*iter).second.get();
 }