Fix extension content verification out-of-band hash fetching

extensions/common/constants.h

 // Copyright (c) 2012 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 EXTENSIONS_COMMON_CONSTANTS_H_
 #define EXTENSIONS_COMMON_CONSTANTS_H_
 
 #include "base/files/file_path.h"
 #include "ui/base/layout.h"
 
@@ skipping 89 matching lines @@
 // The URL query parameter key corresponding to multi-login user index.
 extern const char kAuthUserQueryKey[];
 
 // Mime type strings
 extern const char kMimeTypeJpeg[];
 extern const char kMimeTypePng[];
 
 // The extension id of the Web Store component application.
 extern const char kWebStoreAppId[];
 
+// The key used for signing some pieces of data from the webstore.
+extern const uint8_t kWebstoreSignaturesPublicKey[];
+extern const int kWebstoreSignaturesPublicKeySize;
+
 // Enumeration of possible app launch sources.
 // Note the enumeration is used in UMA histogram so entries
 // should not be re-ordered or removed.
 enum AppLaunchSource {
   SOURCE_UNTRACKED = 0,
   SOURCE_APP_LAUNCHER,
   SOURCE_NEW_TAB_PAGE,
   SOURCE_RELOAD,
   SOURCE_RESTART,
   SOURCE_LOAD_AND_LAUNCH,
@@ skipping 90 matching lines @@
 
 // The extension id for the production version of Hangouts.
 extern const char kProdHangoutsExtensionId[];
 
 // Extension ids used by Hangouts.
 extern const char* const kHangoutsExtensionIds[6];
 
 }  // namespace extension_misc
 
 #endif  // EXTENSIONS_COMMON_CONSTANTS_H_