Revert 56423 - Added classes to enable session sync functionality....

chrome/browser/sync/syncable/model_type.h

 // Copyright (c) 2010 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.
 
 // Enumerate the various item subtypes that are supported by sync.
 // Each sync object is expected to have an immutable object type.
 // An object's type is inferred from the type of data it holds.
 
 #ifndef CHROME_BROWSER_SYNC_SYNCABLE_MODEL_TYPE_H_
 #define CHROME_BROWSER_SYNC_SYNCABLE_MODEL_TYPE_H_
@@ skipping 40 matching lines @@
   // An autofill folder or an autofill object.
   AUTOFILL,
   // A themes folder or a themes object.
   THEMES,
   // A typed_url folder or a typed_url object.
   TYPED_URLS,
   // An extension folder or an extension object.
   EXTENSIONS,
   // An object represeting a set of Nigori keys.
   NIGORI,
-  // An object representing a browser session.
-  SESSIONS,
   // An app folder or an app object.
   APPS,
 
   MODEL_TYPE_COUNT,
 };
 
 typedef std::bitset<MODEL_TYPE_COUNT> ModelTypeBitSet;
 typedef std::set<ModelType> ModelTypeSet;
 
 inline ModelType ModelTypeFromInt(int i) {
@@ skipping 27 matching lines @@
 
 // Converts a notification type to a real model type.  Returns true
 // iff |notification_type| was the notification type of a real model
 // type and |model_type| was filled in.
 bool NotificationTypeToRealModelType(const std::string& notification_type,
                                      ModelType* model_type);
 
 }  // namespace syncable
 
 #endif  // CHROME_BROWSER_SYNC_SYNCABLE_MODEL_TYPE_H_