Fix install verification for sideloaded extensions without update urls

chrome/browser/extensions/extension_service.cc

 // Copyright (c) 2013 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_service.h"
 
 #include <algorithm>
 #include <iterator>
 #include <set>
 
@@ skipping 596 matching lines @@
 }
 
 void ExtensionService::MaybeBootstrapVerifier() {
   InstallVerifier* verifier =
       extensions::ExtensionSystem::Get(profile_)->install_verifier();
   bool do_bootstrap = false;
 
   if (verifier->NeedsBootstrap()) {
     do_bootstrap = true;
   } else {
-    // If any of the installed extensions have an install time newer than the
-    // signature's timestamp, we need to bootstrap because our signature may
-    // be missing valid extensions.
-    base::Time timestamp = verifier->SignatureTimestamp();
     scoped_ptr<extensions::ExtensionSet> extensions =
         GenerateInstalledExtensionsSet();
     for (extensions::ExtensionSet::const_iterator i = extensions->begin();
          i != extensions->end();
          ++i) {
       const Extension& extension = **i;
-      base::Time install_time =
-          extension_prefs_->GetInstallTime(extension.id());
+
       if (verifier->NeedsVerification(extension) &&
-          install_time < base::Time::Now() && install_time >= timestamp) {
+          !verifier->IsKnownId(extension.id())) {
         do_bootstrap = true;
         break;
       }
     }
   }
   if (do_bootstrap)
     VerifyAllExtensions(true);  // bootstrap=true.
 }
 
 void ExtensionService::VerifyAllExtensions(bool bootstrap) {
@@ skipping 2251 matching lines @@
 void ExtensionService::UnloadAllExtensionsInternal() {
   profile_->GetExtensionSpecialStoragePolicy()->RevokeRightsForAllExtensions();
 
   registry_->ClearAll();
   system_->runtime_data()->ClearAll();
 
   // TODO(erikkay) should there be a notification for this?  We can't use
   // EXTENSION_UNLOADED since that implies that the extension has been disabled
   // or uninstalled.
 }