sync: Make BaseNode::GetTitle() return std::string.

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 187 matching lines @@
   // how you find a node's parent.
   int64 GetParentId() const;
 
   // Nodes are either folders or not.  This corresponds to the IS_DIR property
   // of syncable::Entry.
   bool GetIsFolder() const;
 
   // Returns the title of the object.
   // Uniqueness of the title is not enforced on siblings -- it is not an error
   // for two children to share a title.
-  std::wstring GetTitle() const;
+  std::string GetTitle() const;
 
   // Returns the model type of this object.  The model type is set at node
   // creation time and is expected never to change.
   syncable::ModelType GetModelType() const;
 
   // Getter specific to the BOOKMARK datatype.  Returns protobuf
   // data.  Can only be called if GetModelType() == BOOKMARK.
   const sync_pb::BookmarkSpecifics& GetBookmarkSpecifics() const;
 
   // Legacy, bookmark-specific getter that wraps GetBookmarkSpecifics() above.
@@ skipping 866 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_