Implement new SyncAPI and convert Preferences to it.

chrome/browser/sync/engine/syncapi.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.
 
 // This file defines the "sync API", an interface to the syncer
 // backend that exposes (1) the core functionality of maintaining a consistent
 // local snapshot of a hierarchical object set; (2) a means to transactionally
 // access and modify those objects; (3) a means to control client/server
 // synchronization tasks, namely: pushing local object modifications to a
 // server, pulling nonlocal object modifications from a server to this client,
@@ skipping 236 matching lines @@
   const sync_pb::TypedUrlSpecifics& GetTypedUrlSpecifics() const;
 
   // Getter specific to the EXTENSIONS datatype.  Returns protobuf
   // data.  Can only be called if GetModelType() == EXTENSIONS.
   const sync_pb::ExtensionSpecifics& GetExtensionSpecifics() const;
 
   // Getter specific to the SESSIONS datatype.  Returns protobuf
   // data.  Can only be called if GetModelType() == SESSIONS.
   const sync_pb::SessionSpecifics& GetSessionSpecifics() const;
 
+  const sync_pb::EntitySpecifics& GetEntitySpecifics() const;
+
   // Returns the local external ID associated with the node.
   int64 GetExternalId() const;
 
   // Return the ID of the node immediately before this in the sibling order.
   // For the first node in the ordering, return 0.
   int64 GetPredecessorId() const;
 
   // Return the ID of the node immediately after this in the sibling order.
   // For the last node in the ordering, return 0.
   virtual int64 GetSuccessorId() const;
@@ skipping 151 matching lines @@
   void SetTypedUrlSpecifics(const sync_pb::TypedUrlSpecifics& specifics);
 
   // Set the extension specifics (id, update url, enabled state, etc).
   // Should only be called if GetModelType() == EXTENSIONS.
   void SetExtensionSpecifics(const sync_pb::ExtensionSpecifics& specifics);
 
   // Set the session specifics (windows, tabs, navigations etc.).
   // Should only be called if GetModelType() == SESSIONS.
   void SetSessionSpecifics(const sync_pb::SessionSpecifics& specifics);
 
+  // Generic set specifics method. Will extract the model type from |specifics|.
+  void SetEntitySpecifics(const sync_pb::EntitySpecifics& specifics);
+
   // Resets the EntitySpecifics for this node based on the unencrypted data.
   // Will encrypt if necessary.
   void ResetFromSpecifics();
 
   // Implementation of BaseNode's abstract virtual accessors.
   virtual const syncable::Entry* GetEntry() const;
 
   virtual const BaseTransaction* GetTransaction() const;
 
  private:
@@ skipping 603 matching lines @@
  private:
   // An opaque pointer to the nested private class.
   SyncInternal* data_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncManager);
 };
 
 }  // namespace sync_api
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_SYNCAPI_H_