Download resumption - Preliminary

chrome/browser/extensions/updater/extension_updater.cc

 // 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.
 
 #include "chrome/browser/extensions/updater/extension_updater.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 246 matching lines @@
 }
 
 void ExtensionUpdater::DoCheckSoon() {
   DCHECK(will_check_soon_);
   CheckNow();
   will_check_soon_ = false;
 }
 
 void ExtensionUpdater::AddToDownloader(const ExtensionSet* extensions,
     const std::list<std::string>& pending_ids) {
+  if (!extensions)
+    return;
   for (ExtensionSet::const_iterator extension_iter = extensions->begin();
        extension_iter != extensions->end(); ++extension_iter) {
     const Extension& extension = **extension_iter;
     if (!Extension::IsAutoUpdateableLocation(extension.location())) {
       VLOG(2) << "Extension " << extension.id() << " is not auto updateable";
       continue;
     }
     // An extension might be overwritten by policy, and have its update url
     // changed. Make sure existing extensions aren't fetched again, if a
     // pending fetch for an extension with the same id already exists.
@@ skipping 222 matching lines @@
   if (in_progress_ids_.empty()) {
     VLOG(1) << "Sending EXTENSION_UPDATING_FINISHED";
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_EXTENSION_UPDATING_FINISHED,
         content::Source<Profile>(profile_),
         content::NotificationService::NoDetails());
   }
 }
 
 }  // namespace extensions