Fixit: Remove bunch of coverity warnings from chrome/installer/*.

chrome/installer/util/google_chrome_distribution_unittest.cc

Index: chrome/installer/util/google_chrome_distribution_unittest.cc
diff --git a/chrome/installer/util/google_chrome_distribution_unittest.cc b/chrome/installer/util/google_chrome_distribution_unittest.cc
index e4bad05238ef588d603ef74b2965f9945dfc7028..c40406126a70277284cd48caadb79ae32bb08603 100644
--- a/chrome/installer/util/google_chrome_distribution_unittest.cc
+++ b/chrome/installer/util/google_chrome_distribution_unittest.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2009 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.
 //
@@ -31,7 +31,7 @@ class GoogleChromeDistributionTest : public testing::Test {
 
   // Creates "ap" key with the value given as parameter. Also adds work
   // items to work_item_list given so that they can be rolled back later.
-  bool CreateApKey(WorkItemList* work_item_list, std::wstring value) {
+  bool CreateApKey(WorkItemList* work_item_list, const std::wstring& value) {
     HKEY reg_root = HKEY_CURRENT_USER;
     std::wstring reg_key = GetApKeyPath();
     work_item_list->AddCreateRegKeyWorkItem(reg_root, reg_key);