Remove #pragma once from sync

sync/sessions/status_controller.h

 // Copyright (c) 2012 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.
 
 // StatusController handles all counter and status related number crunching and
 // state tracking on behalf of a SyncSession.  It 'controls' the model data
 // defined in session_state.h.  The most important feature of StatusController
 // is the ScopedModelSafetyRestriction. When one of these is active, the
 // underlying data set exposed via accessors is swapped out to the appropriate
 // set for the restricted ModelSafeGroup behind the scenes.  For example, if
@@ skipping 13 matching lines @@
 // SyncerThread) responsible for all "shared" access when no restriction is in
 // place. Thus, every bit of data is to be accessed mutually exclusively with
 // respect to threads.
 //
 // StatusController can also track if changes occur to certain parts of state
 // so that various parts of the sync engine can avoid broadcasting
 // notifications if no changes occurred.
 
 #ifndef SYNC_SESSIONS_STATUS_CONTROLLER_H_
 #define SYNC_SESSIONS_STATUS_CONTROLLER_H_
-#pragma once
 
 #include <map>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/time.h"
 #include "sync/internal_api/public/sessions/model_neutral_state.h"
 #include "sync/sessions/ordered_commit_set.h"
 #include "sync/sessions/session_state.h"
@@ skipping 186 matching lines @@
   }
  private:
   StatusController* status_;
   DISALLOW_COPY_AND_ASSIGN(ScopedModelSafeGroupRestriction);
 };
 
 }  // namespace sessions
 }  // namespace syncer
 
 #endif  // SYNC_SESSIONS_STATUS_CONTROLLER_H_