Coverity: Pass values by reference.

chrome/browser/password_manager/password_store.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_PASSWORD_MANAGER_PASSWORD_STORE_H_
 #define CHROME_BROWSER_PASSWORD_MANAGER_PASSWORD_STORE_H_
 #pragma once
 
 #include <set>
 #include <vector>
@@ skipping 122 matching lines @@
   // Finds all non-blacklist PasswordForms, and fills the vector.
   virtual bool FillAutofillableLogins(
       std::vector<webkit_glue::PasswordForm*>* forms) = 0;
   // Finds all blacklist PasswordForms, and fills the vector.
   virtual bool FillBlacklistLogins(
       std::vector<webkit_glue::PasswordForm*>* forms) = 0;
 
   // Notifies the consumer that a Get*Logins() request is complete.
   virtual void NotifyConsumer(
       GetLoginsRequest* request,
-      const std::vector<webkit_glue::PasswordForm*> forms);
+      const std::vector<webkit_glue::PasswordForm*>& forms);
 
  private:
   // Called by NotifyConsumer, but runs in the consumer's thread.  Will not
   // call the consumer if the request was canceled.  This extra layer is here so
   // that PasswordStoreConsumer doesn't have to be reference counted (we assume
   // consumers will cancel their requests before they are destroyed).
   void NotifyConsumerImpl(PasswordStoreConsumer* consumer, int handle,
-                          const std::vector<webkit_glue::PasswordForm*> forms);
+                          const std::vector<webkit_glue::PasswordForm*>& forms);
 
   // Returns a new request handle tracked in pending_requests_.
   int GetNewRequestHandle();
 
   // Next handle to return from Get*Logins() to allow callers to track
   // their request.
   int handle_;
 
   // List of pending request handles.  Handles are removed from the set when
   // they finish or are canceled.
   std::set<int> pending_requests_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordStore);
 };
 
 #endif  // CHROME_BROWSER_PASSWORD_MANAGER_PASSWORD_STORE_H_