Coverity: Pass parameters by reference.

chrome/browser/sync/glue/autofill_model_associator.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_GLUE_AUTOFILL_MODEL_ASSOCIATOR_H_
 #define CHROME_BROWSER_SYNC_GLUE_AUTOFILL_MODEL_ASSOCIATOR_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 64 matching lines @@
   // than the permanent tagged nodes.
   virtual bool SyncModelHasUserCreatedNodes(bool* has_nodes);
 
   // See ModelAssociator interface.
   virtual void AbortAssociation();
 
   // Not implemented.
   virtual const std::string* GetChromeNodeFromSyncId(int64 sync_id);
 
   // Not implemented.
-  virtual bool InitSyncNodeFromChromeId(std::string node_id,
+  virtual bool InitSyncNodeFromChromeId(const std::string& node_id,
                                         sync_api::BaseNode* sync_node);
 
   // Returns the sync id for the given autofill name, or sync_api::kInvalidId
   // if the autofill name is not associated to any sync id.
-  virtual int64 GetSyncIdFromChromeId(std::string node_id);
+  virtual int64 GetSyncIdFromChromeId(const std::string& node_id);
 
   // Associates the given autofill name with the given sync id.
   virtual void Associate(const std::string* node, int64 sync_id);
 
   // Remove the association that corresponds to the given sync id.
   virtual void Disassociate(int64 sync_id);
 
   // Returns whether a node with the given permanent tag was found and update
   // |sync_id| with that node's id.
   virtual bool GetSyncIdForTaggedNode(const std::string& tag, int64* sync_id);
@@ skipping 106 matching lines @@
   // AssociateModels method as soon as possible.
   Lock abort_association_pending_lock_;
   bool abort_association_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillModelAssociator);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_AUTOFILL_MODEL_ASSOCIATOR_H_