[Sync] Replace manual DI with SetTestingFactory.

components/sync/driver/fake_sync_service.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_SYNC_DRIVER_FAKE_SYNC_SERVICE_H_
 #define COMPONENTS_SYNC_DRIVER_FAKE_SYNC_SERVICE_H_
 
 #include <memory>
 #include <string>
 
 #include "components/sync/driver/sync_service.h"
 #include "components/sync/engine/cycle/sync_cycle_snapshot.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 
 namespace syncer {
 
 class BaseTransaction;
 struct UserShare;
 
 // Fake implementation of SyncService, used for testing.
 class FakeSyncService : public SyncService {
  public:
   FakeSyncService();
   ~FakeSyncService() override;
 
  private:
-  // SyncService:
+  // SyncService implementation.
   bool IsFirstSetupComplete() const override;
   bool IsSyncAllowed() const override;
   bool IsSyncActive() const override;
   bool IsLocalSyncEnabled() const override;
   void TriggerRefresh(const ModelTypeSet& types) override;
   ModelTypeSet GetActiveDataTypes() const override;
   SyncClient* GetSyncClient() const override;
   void AddObserver(SyncServiceObserver* observer) override;
   void RemoveObserver(SyncServiceObserver* observer) override;
   bool HasObserver(const SyncServiceObserver* observer) const override;
@@ skipping 40 matching lines @@
   tracked_objects::Location unrecoverable_error_location() const override;
   void AddProtocolEventObserver(ProtocolEventObserver* observer) override;
   void RemoveProtocolEventObserver(ProtocolEventObserver* observer) override;
   void AddTypeDebugInfoObserver(TypeDebugInfoObserver* observer) override;
   void RemoveTypeDebugInfoObserver(TypeDebugInfoObserver* observer) override;
   base::WeakPtr<JsController> GetJsController() override;
   void GetAllNodes(const base::Callback<void(std::unique_ptr<base::ListValue>)>&
                        callback) override;
   SigninManagerBase* signin() const override;
 
-  // DataTypeEncryptionHandler:
+  // DataTypeEncryptionHandler implementation.
   bool IsPassphraseRequired() const override;
   ModelTypeSet GetEncryptedDataTypes() const override;
 
+  // KeyedService implementation.
+  void Shutdown() override;
+
   GoogleServiceAuthError error_;
   GURL sync_service_url_;
   std::string unrecoverable_error_message_;
   std::unique_ptr<UserShare> user_share_;
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DRIVER_FAKE_SYNC_SERVICE_H_