Refactor the UpdateEngine and its actions in the component updater.

components/update_client/utils.cc

 // Copyright 2014 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 "components/update_client/utils.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 #include <cmath>
 #include <cstring>
 #include <map>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/memory_mapped_file.h"
 #include "base/guid.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
 #include "build/build_config.h"
 #include "components/crx_file/id_util.h"
 #include "components/data_use_measurement/core/data_use_user_data.h"
+#include "components/update_client/component.h"
 #include "components/update_client/configurator.h"
 #include "components/update_client/crx_update_item.h"
 #include "components/update_client/update_client.h"
 #include "components/update_client/update_client_errors.h"
 #include "components/update_client/update_query_params.h"
 #include "components/update_client/updater_state.h"
 #include "crypto/secure_hash.h"
 #include "crypto/sha2.h"
 #include "net/base/load_flags.h"
 #include "net/url_request/url_fetcher.h"
@@ skipping 192 matching lines @@
       // Network errors are small negative numbers.
       const int error = fetcher.GetStatus().error();
       return error ? error : -1;
     }
 
     default:
       return -1;
   }
 }
 
-bool HasDiffUpdate(const CrxUpdateItem* update_item) {
-  return !update_item->crx_diffurls.empty();
+bool HasDiffUpdate(const Component& component) {
+  return !component.crx_diffurls().empty();
 }
 
 bool IsHttpServerError(int status_code) {
   return 500 <= status_code && status_code < 600;
 }
 
 bool DeleteFileAndEmptyParentDirectory(const base::FilePath& filepath) {
   if (!base::DeleteFile(filepath, false))
     return false;
 
@@ skipping 87 matching lines @@
                   [](const GURL& url) { return !url.SchemeIsCryptographic(); }),
               urls->end());
 }
 
 CrxInstaller::Result InstallFunctionWrapper(base::Callback<bool()> callback) {
   return CrxInstaller::Result(callback.Run() ? InstallError::NONE
                                              : InstallError::GENERIC_ERROR);
 }
 
 }  // namespace update_client