Require explicit selection of traits for LazyInstance

extensions/browser/api/printer_provider/printer_provider_api_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 EXTENSIONS_BROWSER_API_PRINTER_PROVIDER_PRINTER_PROVIDER_API_FACTORY_H_
 #define EXTENSIONS_BROWSER_API_PRINTER_PROVIDER_PRINTER_PROVIDER_API_FACTORY_H_
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
@@ skipping 11 matching lines @@
 namespace extensions {
 
 // Factory for PrinterProviderAPI.
 class PrinterProviderAPIFactory : public BrowserContextKeyedServiceFactory {
  public:
   static PrinterProviderAPIFactory* GetInstance();
 
   PrinterProviderAPI* GetForBrowserContext(content::BrowserContext* context);
 
  private:
-  friend struct base::DefaultLazyInstanceTraits<PrinterProviderAPIFactory>;
+  friend struct base::LazyInstanceTraitsBase<PrinterProviderAPIFactory>;
 
   PrinterProviderAPIFactory();
   ~PrinterProviderAPIFactory() override;
 
   // BrowserContextKeyedServiceFactory implementation:
   KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* context) const override;
   content::BrowserContext* GetBrowserContextToUse(
       content::BrowserContext* context) const override;
 
   DISALLOW_COPY_AND_ASSIGN(PrinterProviderAPIFactory);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_PRINTER_PROVIDER_PRINTER_PROVIDER_API_FACTORY_H_