Remember external extensions installed from file in pending extensions map

chrome/browser/extensions/extension_updater.cc

 // Copyright (c) 2010 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 "chrome/browser/extensions/extension_updater.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/logging.h"
@@ skipping 716 matching lines @@
   const ExtensionList* extensions = service_->extensions();
   for (ExtensionList::const_iterator iter = extensions->begin();
        iter != extensions->end(); ++iter) {
     fetches_builder.AddExtension(**iter);
   }
 
   const PendingExtensionMap& pending_extensions =
       service_->pending_extensions();
   for (PendingExtensionMap::const_iterator iter = pending_extensions.begin();
        iter != pending_extensions.end(); ++iter) {
-    fetches_builder.AddPendingExtension(iter->first, iter->second);
+    Extension::Location location = iter->second.install_source;
+    if (location != Extension::EXTERNAL_PREF &&
+        location != Extension::EXTERNAL_REGISTRY)
+      fetches_builder.AddPendingExtension(iter->first, iter->second);
   }
 
   fetches_builder.ReportStats();
 
   std::vector<ManifestFetchData*> fetches(fetches_builder.GetFetches());
 
   // Start a fetch of the blacklist if needed.
   if (blacklist_checks_enabled_ && service_->HasInstalledExtensions()) {
     // Note: it is very important that we use the https version of the update
     // url here to avoid DNS hijacking of the blacklist, which is not validated
@@ skipping 154 matching lines @@
         URLFetcher::Create(kExtensionFetcherId, url, URLFetcher::GET, this));
     extension_fetcher_->set_request_context(
         Profile::GetDefaultRequestContext());
     extension_fetcher_->set_load_flags(net::LOAD_DO_NOT_SEND_COOKIES |
                                        net::LOAD_DO_NOT_SAVE_COOKIES |
                                        net::LOAD_DISABLE_CACHE);
     extension_fetcher_->Start();
     current_extension_fetch_ = ExtensionFetch(id, url, hash, version);
   }
 }