[Sync] Stop accessing BrowserContextKeyedServiceFactory on non-UI thread.

components/sync/driver/fake_generic_change_processor.h

 // Copyright 2014 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_GENERIC_CHANGE_PROCESSOR_H_
 #define COMPONENTS_SYNC_DRIVER_FAKE_GENERIC_CHANGE_PROCESSOR_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/driver/generic_change_processor.h"
 #include "components/sync/driver/generic_change_processor_factory.h"
 #include "components/sync/driver/sync_api_component_factory.h"
 #include "components/sync/model/sync_error.h"
 
 namespace syncer {
 
 // A fake GenericChangeProcessor that can return arbitrary values.
 class FakeGenericChangeProcessor : public GenericChangeProcessor {
  public:
-  FakeGenericChangeProcessor(ModelType type, SyncClient* sync_client);
+  explicit FakeGenericChangeProcessor(ModelType type);
   ~FakeGenericChangeProcessor() override;
 
   // Setters for GenericChangeProcessor implementation results.
   void set_sync_model_has_user_created_nodes(bool has_nodes);
   void set_sync_model_has_user_created_nodes_success(bool success);
 
   // GenericChangeProcessor implementations.
   SyncError ProcessSyncChanges(const tracked_objects::Location& from_here,
                                const SyncChangeList& change_list) override;
   SyncError GetAllSyncDataReturnError(SyncDataList* data) const override;
@@ skipping 12 matching lines @@
  public:
   explicit FakeGenericChangeProcessorFactory(
       std::unique_ptr<FakeGenericChangeProcessor> processor);
   ~FakeGenericChangeProcessorFactory() override;
   std::unique_ptr<GenericChangeProcessor> CreateGenericChangeProcessor(
       ModelType type,
       UserShare* user_share,
       std::unique_ptr<DataTypeErrorHandler> error_handler,
       const base::WeakPtr<SyncableService>& local_service,
       const base::WeakPtr<SyncMergeResult>& merge_result,
-      SyncClient* sync_client) override;
+      SyncApiComponentFactory* driver_factory) override;
 
  private:
   std::unique_ptr<FakeGenericChangeProcessor> processor_;
   DISALLOW_COPY_AND_ASSIGN(FakeGenericChangeProcessorFactory);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DRIVER_FAKE_GENERIC_CHANGE_PROCESSOR_H_