sync: Introduce ModelTypeRegistry and helpers

sync/engine/download.h

 // Copyright 2013 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 SYNC_ENGINE_DOWNLOAD_H_
 #define SYNC_ENGINE_DOWNLOAD_H_
 
 #include "sync/base/sync_export.h"
-#include "sync/engine/sync_directory_update_handler.h"
+#include "sync/engine/get_updates_processor.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/internal_api/public/util/syncer_error.h"
 #include "sync/protocol/sync.pb.h"
 
 namespace sync_pb {
 class DebugInfo;
 }  // namespace sync_pb
 
 namespace syncer {
 
 namespace sessions {
 class DebugInfoGetter;
 class NudgeTracker;
 class StatusController;
 class SyncSession;
 }  // namespace sessions
 
 namespace download {
 
 // This function executes a single GetUpdate request and stores the response in
 // the session's StatusController.  It constructs the type of request used to
 // keep types in sync when in normal mode.
 SYNC_EXPORT_PRIVATE void BuildNormalDownloadUpdates(
     sessions::SyncSession* session,
+    GetUpdatesProcessor* get_updates_processor,
     bool create_mobile_bookmarks_folder,
     ModelTypeSet request_types,
     const sessions::NudgeTracker& nudge_tracker,
     sync_pb::ClientToServerMessage* client_to_server_message);
 
 // Helper function.  Defined here for testing.
 SYNC_EXPORT_PRIVATE void BuildNormalDownloadUpdatesImpl(
     ModelTypeSet proto_request_types,
-    UpdateHandlerMap* update_handler_map,
+    GetUpdatesProcessor* get_updates_processor,
     const sessions::NudgeTracker& nudge_tracker,
     sync_pb::GetUpdatesMessage* get_updates);
 
 // This function executes a single GetUpdate request and stores the response in
 // the session's StatusController.  It constructs the type of request used to
 // initialize a type for the first time.
 SYNC_EXPORT_PRIVATE void BuildDownloadUpdatesForConfigure(
     sessions::SyncSession* session,
+    GetUpdatesProcessor* get_updates_processor,
     bool create_mobile_bookmarks_folder,
     sync_pb::GetUpdatesCallerInfo::GetUpdatesSource source,
     ModelTypeSet request_types,
     sync_pb::ClientToServerMessage* client_to_server_message);
 
 // Helper function.  Defined here for testing.
 SYNC_EXPORT_PRIVATE void BuildDownloadUpdatesForConfigureImpl(
     ModelTypeSet proto_request_types,
-    UpdateHandlerMap* update_handler_map,
+    GetUpdatesProcessor* get_updates_processor,
     sync_pb::GetUpdatesCallerInfo::GetUpdatesSource source,
     sync_pb::GetUpdatesMessage* get_updates);
 
 // This function executes a single GetUpdate request and stores the response in
 // the session's status controller.  It constructs the type of request used for
 // periodic polling.
 SYNC_EXPORT_PRIVATE void BuildDownloadUpdatesForPoll(
     sessions::SyncSession* session,
+    GetUpdatesProcessor* get_updates_processor,
     bool create_mobile_bookmarks_folder,
     ModelTypeSet request_types,
     sync_pb::ClientToServerMessage* client_to_server_message);
 
 // Helper function.  Defined here for testing.
 SYNC_EXPORT_PRIVATE void BuildDownloadUpdatesForPollImpl(
     ModelTypeSet proto_request_types,
-    UpdateHandlerMap* update_handler_map,
+    GetUpdatesProcessor* get_updates_processor,
     sync_pb::GetUpdatesMessage* get_updates);
 
 // Same as BuildDownloadUpdatesForPoll() except the update origin/source is
 // RETRY.
 SYNC_EXPORT_PRIVATE void BuildDownloadUpdatesForRetry(
     sessions::SyncSession* session,
+    GetUpdatesProcessor* get_updates_processor,
     bool create_mobile_bookmarks_folder,
     ModelTypeSet request_types,
     sync_pb::ClientToServerMessage* client_to_server_message);
 
 // Same as BuildDownloadUpdatesForPollImpl() except the update origin/source is
 // RETRY.
 SYNC_EXPORT_PRIVATE void BuildDownloadUpdatesForRetryImpl(
     ModelTypeSet proto_request_types,
-    UpdateHandlerMap* update_handler_map,
+    GetUpdatesProcessor* get_updates_processor,
     sync_pb::GetUpdatesMessage* get_updates);
 
 // Sends the specified message to the server and stores the response in a member
 // of the |session|'s StatusController.
 SYNC_EXPORT_PRIVATE SyncerError
     ExecuteDownloadUpdates(ModelTypeSet request_types,
                            sessions::SyncSession* session,
+                           GetUpdatesProcessor* get_updates_processor,
                            sync_pb::ClientToServerMessage* msg);
 
 // Helper function for processing responses from the server.
 // Defined here for testing.
 SYNC_EXPORT_PRIVATE SyncerError ProcessResponse(
     const sync_pb::GetUpdatesResponse& gu_response,
     ModelTypeSet proto_request_types,
-    UpdateHandlerMap* handler_map,
+    GetUpdatesProcessor* get_updates_processor,
     sessions::StatusController* status);
 
 // Helper function to copy client debug info from debug_info_getter to
 // debug_info.  Defined here for testing.
 SYNC_EXPORT_PRIVATE void CopyClientDebugInfo(
     sessions::DebugInfoGetter* debug_info_getter,
     sync_pb::DebugInfo* debug_info);
 
 }  // namespace download
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_DOWNLOAD_H_