Coverity: Pass parameters by reference.

chrome/browser/sync/glue/bookmark_model_associator.cc

 // 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.
 
 #include "chrome/browser/sync/glue/bookmark_model_associator.h"
 
 #include <stack>
 
 #include "base/hash_tables.h"
 #include "base/message_loop.h"
@@ skipping 158 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }
 
 bool BookmarkModelAssociator::DisassociateModels() {
   id_map_.clear();
   id_map_inverse_.clear();
   dirty_associations_sync_ids_.clear();
   return true;
 }
 
-int64 BookmarkModelAssociator::GetSyncIdFromChromeId(int64 node_id) {
+int64 BookmarkModelAssociator::GetSyncIdFromChromeId(const int64& node_id) {
   BookmarkIdToSyncIdMap::const_iterator iter = id_map_.find(node_id);
   return iter == id_map_.end() ? sync_api::kInvalidId : iter->second;
 }
 
 const BookmarkNode* BookmarkModelAssociator::GetChromeNodeFromSyncId(
     int64 sync_id) {
   SyncIdToBookmarkNodeMap::const_iterator iter = id_map_inverse_.find(sync_id);
   return iter == id_map_inverse_.end() ? NULL : iter->second;
 }
 
 bool BookmarkModelAssociator::InitSyncNodeFromChromeId(
-    int64 node_id,
+    const int64& node_id,
     sync_api::BaseNode* sync_node) {
   DCHECK(sync_node);
   int64 sync_id = GetSyncIdFromChromeId(node_id);
   if (sync_id == sync_api::kInvalidId)
     return false;
   if (!sync_node->InitByIdLookup(sync_id))
     return false;
   DCHECK(sync_node->GetId() == sync_id);
   return true;
 }
@@ skipping 338 matching lines @@
 
   // It's possible that the number of nodes in the bookmark model is not the
   // same as number of nodes in the sync model. This can happen when the sync
   // model doesn't get a chance to persist its changes, for example when
   // Chrome does not shut down gracefully. In such cases we can't trust the
   // loaded associations.
   return sync_node_count == id_index.count();
 }
 
 }  // namespace browser_sync