Protector adds the default prepopulated engine if it was removed.

chrome/browser/search_engines/template_url_service.cc

 // Copyright (c) 2011 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/search_engines/template_url_service.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/i18n/case_conversion.h"
@@ skipping 304 matching lines @@
 void TemplateURLService::Add(TemplateURL* template_url) {
   AddNoNotify(template_url);
   NotifyObservers();
 }
 
 void TemplateURLService::Remove(const TemplateURL* template_url) {
   RemoveNoNotify(template_url);
   NotifyObservers();
 }
 
+void TemplateURLService::Update(const TemplateURL* existing_turl,
+                                const TemplateURL& new_values) {
+  UpdateNoNotify(existing_turl, new_values);

[sky, 2011/11/28 17:03:11]

Add test coverage of this.

[Ivan Korotkov, 2011/11/29 10:13:47]

Done.

+  NotifyObservers();
+}
+
 void TemplateURLService::RemoveAutoGeneratedBetween(base::Time created_after,
                                                     base::Time created_before) {
   bool should_notify = false;
   for (size_t i = 0; i < template_urls_.size();) {
     if (template_urls_[i]->date_created() >= created_after &&
         (created_before.is_null() ||
          template_urls_[i]->date_created() < created_before) &&
         CanReplace(template_urls_[i])) {
       RemoveNoNotify(template_urls_[i]);
       should_notify = true;
@@ skipping 1522 matching lines @@
        i != template_urls->end(); ++i) {
     TemplateURL* template_url = *i;
     DCHECK(template_url);
     if (template_url->sync_guid().empty()) {
       template_url->set_sync_guid(guid::GenerateGUID());
       if (service_.get())
         service_->UpdateKeyword(*template_url);
     }
   }
 }