Validate hash_sha256 checksum on .crx update.

extensions/browser/BUILD.gn

 # 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.
 
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 
 # GYP version: extensions/extensions.gyp:extensions_browser
 source_set("browser") {
   sources = []
@@ skipping 321 matching lines @@
       "content_hash_reader.h",
       "content_hash_tree.cc",
       "content_hash_tree.h",
       "content_verifier.cc",
       "content_verifier.h",
       "content_verifier_delegate.h",
       "content_verifier_io_data.cc",
       "content_verifier_io_data.h",
       "content_verify_job.cc",
       "content_verify_job.h",
+      "crx_file_info.cc",
+      "crx_file_info.h",
       "error_map.cc",
       "error_map.h",
       "event_listener_map.cc",
       "event_listener_map.h",
       "event_router.cc",
       "event_router.h",
       "extension_error.cc",
       "extension_error.h",
       "extension_function.cc",
       "extension_function.h",
@@ skipping 257 matching lines @@
         "api/networking_private/networking_private_service_client.cc",
         "api/networking_private/networking_private_service_client.h",
       ]
     }
   }
 
   if (is_win) {
     cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   }
 }