[Sync] Move ChangeRecord into its own file (change_record.{h,cc})

chrome/browser/sync/glue/generic_change_processor.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_GENERIC_CHANGE_PROCESSOR_H_
 #define CHROME_BROWSER_SYNC_GLUE_GENERIC_CHANGE_PROCESSOR_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 20 matching lines @@
  public:
   GenericChangeProcessor(SyncableService* local_service,
                          UnrecoverableErrorHandler* error_handler,
                          sync_api::UserShare* user_share);
   virtual ~GenericChangeProcessor();
 
   // ChangeProcessor interface.
   // Build and store a list of all changes into |syncer_changes_|.
   virtual void ApplyChangesFromSyncModel(
       const sync_api::BaseTransaction* trans,
-      const sync_api::SyncManager::ChangeRecord* changes,
-      int change_count) OVERRIDE;
+      const sync_api::ImmutableChangeRecordList& changes) OVERRIDE;
   // Passes |syncer_changes_|, built in ApplyChangesFromSyncModel, onto
   // |local_service_| by way of it's ProcessSyncChanges method.
   virtual void CommitChangesFromSyncModel() OVERRIDE;
 
   // SyncChangeProcessor implementation.
   virtual SyncError ProcessSyncChanges(
       const tracked_objects::Location& from_here,
       const SyncChangeList& change_list) OVERRIDE;
 
   // Fills |current_sync_data| with all the syncer data for the specified type.
@@ skipping 24 matching lines @@
   // be able to access the sync model before the change processor begins
   // listening to changes (the local_service_ will be interacting with us
   // when it starts up). As such we can't wait until Start(_) has been called,
   // and have to keep a local pointer to the user_share.
   sync_api::UserShare* user_share_;
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_GENERIC_CHANGE_PROCESSOR_H_