Introduce StrategyOnCacheMiss enum instead of |cached_only| boolean.

components/password_manager/core/browser/affiliation_backend.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 COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_AFFILIATION_BACKEND_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_AFFILIATION_BACKEND_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 32 matching lines @@
 // I/O, the backend ends up doing most of the work for the AffiliationService;
 // the latter being just a thin layer that delegates most tasks to the backend.
 //
 // This class is not thread-safe, but it is fine to construct it on one thread
 // and then transfer it to the background thread for the rest of its life.
 // Initialize() must be called already on the final (background) thread.
 class AffiliationBackend : public FacetManagerHost,
                            public AffiliationFetcherDelegate,
                            public AffiliationFetchThrottlerDelegate {
  public:
+  using StrategyOnCacheMiss = AffiliationService::StrategyOnCacheMiss;
+
   // Constructs an instance that will use |request_context_getter| for all
   // network requests, use |task_runner| for asynchronous tasks, and will rely
   // on |time_source| and |time_tick_source| to tell the current time/ticks.
   // Construction is very cheap, expensive steps are deferred to Initialize().
   AffiliationBackend(
       const scoped_refptr<net::URLRequestContextGetter>& request_context_getter,
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       scoped_ptr<base::Clock> time_source,
       scoped_ptr<base::TickClock> time_tick_source);
   ~AffiliationBackend() override;
 
   // Performs the I/O-heavy part of initialization. The database used to cache
   // affiliation information locally will be opened/created at |db_path|.
   void Initialize(const base::FilePath& db_path);
 
   // Implementations for methods of the same name in AffiliationService. They
   // are not documented here again. See affiliation_service.h for details:
   void GetAffiliations(
       const FacetURI& facet_uri,
-      bool cached_only,
+      StrategyOnCacheMiss cache_miss_strategy,
       const AffiliationService::ResultCallback& callback,
       const scoped_refptr<base::TaskRunner>& callback_task_runner);
   void Prefetch(const FacetURI& facet_uri, const base::Time& keep_fresh_until);
   void CancelPrefetch(const FacetURI& facet_uri,
                       const base::Time& keep_fresh_until);
   void TrimCache();
 
  private:
   friend class AffiliationBackendTest;
 
@@ skipping 47 matching lines @@
   base::ScopedPtrHashMap<FacetURI, FacetManager> facet_managers_;
 
   base::WeakPtrFactory<AffiliationBackend> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AffiliationBackend);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_AFFILIATION_BACKEND_H_