Remove chrome-extension-resource:// scheme

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"
 
 namespace extensions {
 
 // Scheme we serve extension content from.
 extern const char kExtensionScheme[];
 
-// Canonical schemes you can use as input to GURL.SchemeIs().
-extern const char kExtensionResourceScheme[];
-
 // The name of the manifest inside an extension.
 extern const base::FilePath::CharType kManifestFilename[];
 
 // The name of locale folder inside an extension.
 extern const base::FilePath::CharType kLocaleFolder[];
 
 // The name of the messages file inside an extension.
 extern const base::FilePath::CharType kMessagesFilename[];
 
 // The base directory for subdirectories with platform-specific code.
@@ skipping 190 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_