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

chrome/installer/util/delete_reg_value_work_item.cc

-// 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.
 
 #include "chrome/installer/util/delete_reg_value_work_item.h"
 
 #include "base/registry.h"
 #include "chrome/installer/util/logging_installer.h"
 
 DeleteRegValueWorkItem::DeleteRegValueWorkItem(HKEY predefined_root,
-                                               std::wstring key_path,
-                                               std::wstring value_name,
+                                               const std::wstring& key_path,
+                                               const std::wstring& value_name,
                                                bool is_str_type)
     : predefined_root_(predefined_root),
       key_path_(key_path),
       value_name_(value_name),
       is_str_type_(is_str_type),
-      status_(DELETE_VALUE) {
+      status_(DELETE_VALUE),
+      old_dw_(0) {
 }
 
 DeleteRegValueWorkItem::~DeleteRegValueWorkItem() {
 }
 
 bool DeleteRegValueWorkItem::Do() {
   if (status_ != DELETE_VALUE) {
     // we already did something.
     LOG(ERROR) << "multiple calls to Do()";
     return false;
@@ skipping 43 matching lines @@
                                               old_dw_))) {
     status_ = VALUE_ROLLED_BACK;
     LOG(INFO) << "rollback: restored " << value_name_;
   } else {
     LOG(ERROR) << "failed to restore value " << value_name_;
   }
 
   key.Close();
   return;
 }