[Sync] Renaming sync/api* to sync/model*.

components/sync/api/sync_change_processor.h

-// 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 COMPONENTS_SYNC_API_SYNC_CHANGE_PROCESSOR_H_
-#define COMPONENTS_SYNC_API_SYNC_CHANGE_PROCESSOR_H_
-
-#include <string>
-#include <vector>
-
-#include "components/sync/api/sync_data.h"
-#include "components/sync/api/sync_error.h"
-#include "components/sync/base/model_type.h"
-
-namespace tracked_objects {
-class Location;
-}  // namespace tracked_objects
-
-namespace syncer {
-
-class SyncChange;
-
-class LocalChangeObserver;
-
-typedef std::vector<SyncChange> SyncChangeList;
-
-// An interface for services that handle receiving SyncChanges.
-class SyncChangeProcessor {
- public:
-  // Whether a context change should force a datatype refresh or not.
-  enum ContextRefreshStatus { NO_REFRESH, REFRESH_NEEDED };
-  typedef base::Callback<void(const SyncData&)> GetSyncDataCallback;
-
-  SyncChangeProcessor();
-  virtual ~SyncChangeProcessor();
-
-  // Process a list of SyncChanges.
-  // Returns: A default SyncError (IsSet() == false) if no errors were
-  //          encountered, and a filled SyncError (IsSet() == true)
-  //          otherwise.
-  // Inputs:
-  //   |from_here|: allows tracking of where sync changes originate.
-  //   |change_list|: is the list of sync changes in need of processing.
-  virtual SyncError ProcessSyncChanges(
-      const tracked_objects::Location& from_here,
-      const SyncChangeList& change_list) = 0;
-
-  // Fills a list of SyncData. This should create an up to date representation
-  // of all the data known to the ChangeProcessor for |datatype|, and
-  // should match/be a subset of the server's view of that datatype.
-  //
-  // WARNING: This can be a potentially slow & memory intensive operation and
-  // should only be used when absolutely necessary / sparingly.
-  virtual SyncDataList GetAllSyncData(ModelType type) const = 0;
-
-  // Retrieves the SyncData identified by |type| and |sync_tag| and invokes
-  // |callback| asynchronously. If no such SyncData exists locally, IsValid on
-  // the SyncData passed to |callback| will return false.
-  //
-  // This is an asynchronous local operation that may result in disk IO.
-  //
-  // Refer to sync_data.h for a description of |sync_tag|.
-  //
-  // TODO(maniscalco): N.B. this method should really be pure virtual. An
-  // implentation is provided here just to verify that everything compiles.
-  // Update this method to be pure virtual (bug 353300).
-  virtual void GetSyncData(const ModelType& type,
-                           const std::string& sync_tag,
-                           const GetSyncDataCallback& callback) const {}
-
-  // Updates the context for |type|, triggering an optional context refresh.
-  // Default implementation does nothing. A type's context is a per-client blob
-  // that can affect all SyncData sent to/from the server, much like a cookie.
-  // TODO(zea): consider pulling the refresh logic into a separate method
-  // unrelated to datatype implementations.
-  virtual SyncError UpdateDataTypeContext(ModelType type,
-                                          ContextRefreshStatus refresh_status,
-                                          const std::string& context);
-
-  // Adds an observer of local sync changes. This observer is notified when
-  // local sync changes are applied by GenericChangeProcessor. observer is
-  // not owned by the SyncChangeProcessor.
-  virtual void AddLocalChangeObserver(LocalChangeObserver* observer);
-  virtual void RemoveLocalChangeObserver(LocalChangeObserver* observer);
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_API_SYNC_CHANGE_PROCESSOR_H_