Revert 114494 - Remove BindStateHolder and have Bind() return a Callback<> object directly.

chrome/browser/sync/glue/session_model_associator.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.
 
 #ifndef CHROME_BROWSER_SYNC_GLUE_SESSION_MODEL_ASSOCIATOR_H_
 #define CHROME_BROWSER_SYNC_GLUE_SESSION_MODEL_ASSOCIATOR_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 183 matching lines @@
 
   // Returns the syncable model type.
   static syncable::ModelType model_type() { return syncable::SESSIONS; }
 
   // Testing only. Will cause the associator to call MessageLoop::Quit()
   // when a local change is made, or when timeout_milli occurs, whichever is
   // first.
   void BlockUntilLocalChangeForTest(int64 timeout_milli);
 
   // Callback for when the session name has been computed.
-  void OnSessionNameInitialized(const std::string& name);
+  void OnSessionNameInitialized(const std::string name);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ProfileSyncServiceSessionTest, WriteSessionToNode);
   FRIEND_TEST_ALL_PREFIXES(ProfileSyncServiceSessionTest,
                            WriteFilledSessionToNode);
   FRIEND_TEST_ALL_PREFIXES(ProfileSyncServiceSessionTest,
                            WriteForeignSessionToNode);
   FRIEND_TEST_ALL_PREFIXES(ProfileSyncServiceSessionTest, TabNodePoolEmpty);
   FRIEND_TEST_ALL_PREFIXES(ProfileSyncServiceSessionTest, TabNodePoolNonEmpty);
   FRIEND_TEST_ALL_PREFIXES(SessionModelAssociatorTest, PopulateSessionHeader);
@@ skipping 251 matching lines @@
   // is made.
   bool waiting_for_change_;
   ScopedRunnableMethodFactory<SessionModelAssociator> test_method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionModelAssociator);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SESSION_MODEL_ASSOCIATOR_H_