Refactor CRX verification in preparation to support CRX₃ files.

components/update_client/update_client_errors.h

 // Copyright 2016 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 COMPONENTS_UPDATE_CLIENT_UPDATE_CLIENT_ERRORS_H_
 #define COMPONENTS_UPDATE_CLIENT_UPDATE_CLIENT_ERRORS_H_
 
 namespace update_client {
 
 // Errors generated as a result of calling UpdateClient member functions.
@@ skipping 33 matching lines @@
 // indicate unpacker or patcher error.
 enum class UnpackerError {
   kNone = 0,
   kInvalidParams = 1,
   kInvalidFile = 2,
   kUnzipPathError = 3,
   kUnzipFailed = 4,
   // kNoManifest = 5,         // Deprecated. Never used.
   kBadManifest = 6,
   kBadExtension = 7,
-  kInvalidId = 8,
+  // kInvalidId = 8,          // Deprecated. Combined with kInvalidFile.
   // kInstallerError = 9,     // Deprecated. Don't use.
   kIoError = 10,
   kDeltaVerificationFailure = 11,
   kDeltaBadCommands = 12,
   kDeltaUnsupportedCommand = 13,
   kDeltaOperationFailure = 14,
   kDeltaPatchProcessFailure = 15,
   kDeltaMissingExistingFile = 16,
   // kFingerprintWriteFailed = 17,    // Deprecated. Don't use.
 };
@@ skipping 19 matching lines @@
 // indicate critical or configuration errors in the update service.
 enum class ServiceError {
   NONE = 0,
   SERVICE_WAIT_FAILED = 1,
   UPDATE_DISABLED = 2,
 };
 
 }  // namespace update_client
 
 #endif  // COMPONENTS_UPDATE_CLIENT_UPDATE_CLIENT_ERRORS_H_