[Sync] Replace manual DI with SetTestingFactory.

components/sync/driver/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_SYNC_SERVICE_H_
 #define COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
+#include "components/keyed_service/core/keyed_service.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/driver/data_type_encryption_handler.h"
 #include "components/sync/driver/sync_service_observer.h"
 #include "components/sync/engine/connection_status.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 
 class GoogleServiceAuthError;
 class SigninManagerBase;
 
 namespace sync_sessions {
@@ skipping 39 matching lines @@
   // UIs should not construct this directly, but instead call
   // SyncService::GetSetupInProgress().
   explicit SyncSetupInProgressHandle(base::Closure on_destroy);
 
   ~SyncSetupInProgressHandle();
 
  private:
   base::Closure on_destroy_;
 };
 
-class SyncService : public DataTypeEncryptionHandler {
+class SyncService : public DataTypeEncryptionHandler, public KeyedService {
  public:
   // Used to specify the kind of passphrase with which sync data is encrypted.
   enum PassphraseType {
     IMPLICIT,  // The user did not provide a custom passphrase for encryption.
                // We implicitly use the GAIA password in such cases.
     EXPLICIT,  // The user selected the "use custom passphrase" radio button
                // during sync setup and provided a passphrase.
   };
 
   // Passed as an argument to RequestStop to control whether or not the sync
@@ skipping 269 matching lines @@
  protected:
   SyncService() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncService);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_H_