[Sync] Refactor non-frontend DTC to handle new API properly.

chrome/browser/sync/profile_sync_factory.h

 // Copyright (c) 2011 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 CHROME_BROWSER_SYNC_PROFILE_SYNC_FACTORY_H__
 #define CHROME_BROWSER_SYNC_PROFILE_SYNC_FACTORY_H__
 #pragma once
 
 #include <string>
 #include <utility>
 
 #include "base/task.h"
 #include "chrome/browser/sync/glue/change_processor.h"
 #include "chrome/browser/sync/glue/data_type_controller.h"
 #include "chrome/browser/sync/glue/model_associator.h"
 #include "chrome/browser/sync/unrecoverable_error_handler.h"
 
 class ExtensionSettingsBackend;
 class PasswordStore;
 class PersonalDataManager;
 class ProfileSyncService;
+class SyncableService;
 class WebDatabase;
 class WebDataService;
 
 namespace browser_sync {
 class DataTypeManager;
+class GenericChangeProcessor;
+class SharedChangeProcessor;
 class SyncBackendHost;
 class UnrecoverableErrorHandler;
 }
 
 namespace history {
 class HistoryBackend;
 };
 
 // Factory class for all profile sync related classes.
 class ProfileSyncFactory {
  public:
   // The various factory methods for the data type model associators
   // and change processors all return this struct.  This is needed
   // because the change processors typically require a type-specific
   // model associator at construction time.
+  //
+  // Note: This interface is deprecated in favor of the SyncableService API.
+  // New datatypes that do not live on the UI thread should directly return a
+  // weak pointer to a SyncableService. All others continue to return
+  // SyncComponents. It is safe to assume that the factory methods below are
+  // called on the same thread in which the datatype resides.
+  //
+  // TODO(zea): Have all datatypes using the new API switch to returning
+  // SyncableService weak pointers instead of SyncComponents (crbug.com/100114).
   struct SyncComponents {
     browser_sync::AssociatorInterface* model_associator;
     browser_sync::ChangeProcessor* change_processor;
     SyncComponents(browser_sync::AssociatorInterface* ma,
                    browser_sync::ChangeProcessor* cp)
         : model_associator(ma), change_processor(cp) {}
   };
 
   virtual ~ProfileSyncFactory() {}
 
   // Instantiates a new ProfileSyncService. The return pointer is owned by the
   // caller.
   virtual ProfileSyncService* CreateProfileSyncService(
       const std::string& cros_user) = 0;
 
   // Creates and registers enabled datatypes with the provided
   // ProfileSyncService.
   virtual void RegisterDataTypes(ProfileSyncService* pss) = 0;
 
   // Instantiates a new DataTypeManager with a SyncBackendHost and a
   // list of data type controllers.  The return pointer is owned by
   // the caller.
   virtual browser_sync::DataTypeManager* CreateDataTypeManager(
       browser_sync::SyncBackendHost* backend,
       const browser_sync::DataTypeController::TypeMap* controllers) = 0;
 
+  // Creating this in the factory helps us mock it out in testing.
+  virtual browser_sync::GenericChangeProcessor* CreateGenericChangeProcessor(
+      ProfileSyncService* profile_sync_service,
+      browser_sync::UnrecoverableErrorHandler* error_handler,
+      const base::WeakPtr<SyncableService>& local_service) = 0;
+
+  virtual browser_sync::SharedChangeProcessor*
+      CreateSharedChangeProcessor() = 0;
+
   // Instantiates both a model associator and change processor for the
   // app data type.  The pointers in the return struct are
   // owned by the caller.
   virtual SyncComponents CreateAppSyncComponents(
       ProfileSyncService* profile_sync_service,
       browser_sync::UnrecoverableErrorHandler* error_handler) = 0;
 
   // Instantiates both a model associator and change processor for the
   // autofill data type.  The pointers in the return struct are owned
   // by the caller.
   virtual SyncComponents CreateAutofillSyncComponents(
       ProfileSyncService* profile_sync_service,
       WebDatabase* web_database,
       browser_sync::UnrecoverableErrorHandler* error_handler) = 0;
 
-  // Instantiates both a model associator and change processor for the
-  // autofill data type.  The pointers in the return struct are owned
-  // by the caller.
-  virtual SyncComponents CreateAutofillProfileSyncComponents(
-      ProfileSyncService* profile_sync_service,
-      WebDataService* web_data_service,
-      browser_sync::UnrecoverableErrorHandler* error_handler) = 0;
+  // Returns a weak pointer to the SyncableService associated with the datatype.
+  // The SyncableService is not owned by Sync, but by the backend service
+  // itself.
+  virtual base::WeakPtr<SyncableService> GetAutofillProfileSyncableService(
+      WebDataService* web_data_service) const = 0;
 
   // Instantiates both a model associator and change processor for the
   // bookmark data type.  The pointers in the return struct are owned
   // by the caller.
   virtual SyncComponents CreateBookmarkSyncComponents(
       ProfileSyncService* profile_sync_service,
       browser_sync::UnrecoverableErrorHandler* error_handler) = 0;
 
   // Instantiates both a model associator and change processor for the
   // extension setting data type.  The pointers in the return struct are
@@ skipping 49 matching lines @@
 
   // Instantiates both a model associator and change processor for the search
   // engine data type.  The pointers in the return struct are owned by the
   // caller.
   virtual SyncComponents CreateSearchEngineSyncComponents(
       ProfileSyncService* profile_sync_service,
       browser_sync::UnrecoverableErrorHandler* error_handler) = 0;
 };
 
 #endif  // CHROME_BROWSER_SYNC_PROFILE_SYNC_FACTORY_H__