sync: Implement per-type commit interface

sync/engine/commit_util.h

Index: sync/engine/commit_util.h
diff --git a/sync/engine/commit_util.h b/sync/engine/commit_util.h
new file mode 100644
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+++ b/sync/engine/commit_util.h
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+// Copyright 2012 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_BUILD_COMMIT_UTIL_H_
+#define SYNC_ENGINE_BUILD_COMMIT_UTIL_H_
+
+#include "sync/base/sync_export.h"
+#include "sync/internal_api/public/base/model_type.h"
+#include "sync/protocol/sync.pb.h"
+#include "sync/util/extensions_activity.h"
+
+namespace sync_pb {
+class CommitMessage;
+class SyncEntity;
+}
+
+namespace syncer {
+
+namespace syncable {
+class BaseTransaction;
+class Entry;
+class Id;
+class BaseWriteTransaction;
+}
+
+namespace commit_util {
+
+// Adds bookmark extensions activity report to |message|.
+SYNC_EXPORT_PRIVATE void AddExtensionsActivityToMessage(
+    ExtensionsActivity* activity,
+    ExtensionsActivity::Records* extensions_activity_buffer,
+    sync_pb::CommitMessage* message);
+
+// Fills the config_params field of |message|.
+SYNC_EXPORT_PRIVATE void AddClientConfigParamsToMessage(
+    ModelTypeSet enabled_types,
+    sync_pb::CommitMessage* message);
+
+// Takes a snapshot of |meta_entry| and puts it into a protobuf suitable for use
+// in a commit request message.
+SYNC_EXPORT_PRIVATE void BuildCommitItem(
+    const syncable::Entry& meta_entry,
+    sync_pb::SyncEntity* sync_entry);
+
+// Process a single commit response.  Updates the entry's SERVER fields using
+// |pb_commit_response| and |pb_committed_entry|.
+//
+// The |deleted_folders| parameter is a set of IDs that represent deleted
+// folders.  This function will add its entry's ID to this set if it finds
+// itself processing a folder deletion.
+SYNC_EXPORT_PRIVATE
+sync_pb::CommitResponse::ResponseType ProcessSingleCommitResponse(
+    syncable::BaseWriteTransaction* trans,
+    const sync_pb::CommitResponse_EntryResponse& server_entry,
+    const sync_pb::SyncEntity& commit_request_entry,
+    int64 metahandle,
+    std::set<syncable::Id>* deleted_folders);
+
+}  // namespace commit_util
+
+}  // namespace syncer
+
+#endif  // SYNC_ENGINE_BUILD_COMMIT_UTIL_H_