Require explicit selection of traits for LazyInstance

chrome/browser/feedback/feedback_profile_observer.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_FEEDBACK_FEEDBACK_PROFILE_OBSERVER_H_
 #define CHROME_BROWSER_FEEDBACK_FEEDBACK_PROFILE_OBSERVER_H_
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace feedback {
 
 class FeedbackUploader;
 
 // FeedbackProfileObserver waits on profile creation notifications to check
 // if the profile has any pending feedback reports to upload. If it does, it
 // queues those reports for upload.
 class FeedbackProfileObserver : public content::NotificationObserver {
  public:
   static void Initialize();
 
  private:
-  friend struct base::DefaultLazyInstanceTraits<FeedbackProfileObserver>;
+  friend struct base::LazyInstanceTraitsBase<FeedbackProfileObserver>;
 
   FeedbackProfileObserver();
   ~FeedbackProfileObserver() override;
 
   // content::NotificationObserver override
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   // Loads any unsent reports from disk and queues them to be uploaded in
   // the given browser context.
   void QueueUnsentReports(content::BrowserContext* context);
 
   static void QueueSingleReport(feedback::FeedbackUploader* uploader,
                                 const std::string& data);
 
   // Used to track creation of profiles so we can load any unsent reports
   // for that profile.
   content::NotificationRegistrar prefs_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(FeedbackProfileObserver);
 };
 
 }  // namespace feedback
 
 #endif  // CHROME_BROWSER_FEEDBACK_FEEDBACK_PROFILE_OBSERVER_H_