Implement sync in the NonBlockingTypeProcessor

sync/engine/non_blocking_sync_common.h

Index: sync/engine/non_blocking_sync_common.h
diff --git a/sync/engine/non_blocking_sync_common.h b/sync/engine/non_blocking_sync_common.h
new file mode 100644
index 0000000000000000000000000000000000000000..f07fdb2684e2c2239bc9f838456e06242bd8234f
--- /dev/null
+++ b/sync/engine/non_blocking_sync_common.h
@@ -0,0 +1,98 @@
+// 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 SYNC_ENGINE_NON_BLOCKING_SYNC_COMMON_H_
+#define SYNC_ENGINE_NON_BLOCKING_SYNC_COMMON_H_
+
+#include <string>
+#include <vector>
+
+#include "base/time/time.h"
+#include "sync/base/sync_export.h"
+#include "sync/protocol/sync.pb.h"
+
+namespace syncer {
+
+// Data-type global state that must be accessed and updated on the sync thread,
+// but persisted on or through the model thread.
+struct SYNC_EXPORT_PRIVATE DataTypeState {
+  DataTypeState();
+  ~DataTypeState();
+
+  // The latest progress markers received from the server.
+  sync_pb::DataTypeProgressMarker progress_marker;
+
+  // A data type context.  Sent to the server in every commit or update
+  // request.  May be updated by either by responses from the server or
+  // requests made on the model thread.  The interpretation of this value may
+  // be data-type specific.  Many data types ignore it.
+  sync_pb::DataTypeContext type_context;
+
+  // The ID of the folder node that sits at the top of this type's folder
+  // hierarchy.  We keep this around for legacy reasons.  The protocol expects
+  // that all nodes of a certain type are children of the same type root
+  // entity.  This entity is delivered by the server, and may not be available
+  // until the first download cycle has completed.
+  std::string type_root_id;
+
+  // A strictly increasing counter used to generate unique values for the
+  // client-assigned IDs.  The incrementing and ID assignment happens on the
+  // sync thread, but we store the value here so we can pass it back to the
+  // model thread for persistence.  This is probably unnecessary for the
+  // client-tagged data types supported by non-blocking sync, but we will
+  // continue to emulate the directory sync's behavior for now.
+  int64 next_client_id;
+};
+
+struct SYNC_EXPORT_PRIVATE CommitRequestData {
+  CommitRequestData();
+  ~CommitRequestData();
+
+  std::string id;
+  std::string client_tag_hash;
+
+  // Strictly incrementing number for in-progress commits.  More information
+  // about its meaning can be found in comments in the files that make use of
+  // this struct.
+  int64 sequence_number;
+
+  int64 base_version;
+  base::Time ctime;
+  base::Time mtime;
+  std::string non_unique_name;
+  bool deleted;
+  sync_pb::EntitySpecifics specifics;
+};
+
+struct SYNC_EXPORT_PRIVATE CommitResponseData {
+  CommitResponseData();
+  ~CommitResponseData();
+
+  std::string id;
+  std::string client_tag_hash;
+  int64 sequence_number;
+  int64 response_version;
+};
+
+struct SYNC_EXPORT_PRIVATE UpdateResponseData {
+  UpdateResponseData();
+  ~UpdateResponseData();
+
+  std::string id;
+  std::string client_tag_hash;
+  int64 response_version;
+  base::Time ctime;
+  base::Time mtime;
+  std::string non_unique_name;
+  bool deleted;
+  sync_pb::EntitySpecifics specifics;
+};
+
+typedef std::vector<CommitRequestData> CommitRequestDataList;
+typedef std::vector<CommitResponseData> CommitResponseDataList;
+typedef std::vector<UpdateResponseData> UpdateResponseDataList;
+
+}  // namespace syncer
+
+#endif  // SYNC_ENGINE_NON_BLOCKING_SYNC_COMMON_H_