[Sync] Made some sync session member functions const

chrome/browser/sync/engine/apply_updates_command.cc

 // 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.
 
 #include "chrome/browser/sync/engine/apply_updates_command.h"
 
 #include "base/location.h"
 #include "chrome/browser/sync/engine/update_applicator.h"
 #include "chrome/browser/sync/sessions/sync_session.h"
 #include "chrome/browser/sync/syncable/directory_manager.h"
@@ skipping 14 matching lines @@
     return;
   }
   syncable::WriteTransaction trans(FROM_HERE, syncable::SYNCER, dir);
   syncable::Directory::UnappliedUpdateMetaHandles handles;
   dir->GetUnappliedUpdateMetaHandles(&trans, &handles);
 
   UpdateApplicator applicator(
       session->context()->resolver(),
       session->context()->directory_manager()->GetCryptographer(&trans),
       handles.begin(), handles.end(), session->routing_info(),
-      session->status_controller()->group_restriction());
+      session->status_controller().group_restriction());
   while (applicator.AttemptOneApplication(&trans)) {}
   applicator.SaveProgressIntoSessionState(
-      session->status_controller()->mutable_conflict_progress(),
-      session->status_controller()->mutable_update_progress());
+      session->mutable_status_controller()->mutable_conflict_progress(),
+      session->mutable_status_controller()->mutable_update_progress());
 
   // This might be the first time we've fully completed a sync cycle, for
   // some subset of the currently synced datatypes.
-  sessions::StatusController* status(session->status_controller());
-  if (status->ServerSaysNothingMoreToDownload()) {
+  const sessions::StatusController& status(session->status_controller());
+  if (status.ServerSaysNothingMoreToDownload()) {
     syncable::ScopedDirLookup dir(session->context()->directory_manager(),
                                   session->context()->account_name());
     if (!dir.good()) {
       LOG(ERROR) << "Scoped dir lookup failed!";
       return;
     }
 
     for (int i = syncable::FIRST_REAL_MODEL_TYPE;
          i < syncable::MODEL_TYPE_COUNT; ++i) {
       syncable::ModelType model_type = syncable::ModelTypeFromInt(i);
-      if (status->updates_request_types()[i]) {
+      if (status.updates_request_types()[i]) {
         // This gets persisted to the directory's backing store.
         dir->set_initial_sync_ended_for_type(model_type, true);
       }
     }
   }
 }
 
 }  // namespace browser_sync