Require explicit selection of traits for LazyInstance

chrome/browser/media/router/media_router_factory.h

 // Copyright 2015 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_MEDIA_ROUTER_MEDIA_ROUTER_FACTORY_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_FACTORY_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
@@ skipping 14 matching lines @@
   static MediaRouter* GetApiForBrowserContext(content::BrowserContext* context);
 
   static MediaRouterFactory* GetInstance();
 
  protected:
   // We override the shutdown method for the factory to give the Media Router a
   // chance to remove incognito media routes.
   void BrowserContextShutdown(content::BrowserContext* context) override;
 
  private:
-  friend struct base::DefaultLazyInstanceTraits<MediaRouterFactory>;
+  friend struct base::LazyInstanceTraitsBase<MediaRouterFactory>;
   FRIEND_TEST_ALL_PREFIXES(MediaRouterFactoryTest,
                            IncognitoBrowserContextShutdown);
 
   MediaRouterFactory();
   ~MediaRouterFactory() override;
 
   // BrowserContextKeyedServiceFactory interface.
   content::BrowserContext* GetBrowserContextToUse(
       content::BrowserContext* context) const override;
 
   KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* context) const override;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterFactory);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_FACTORY_H_