Delete from Sync the artificial search engines created by the omnibox extensions.

chrome/browser/search_engines/chrome_template_url_service_client.cc

 // 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.
 
 #include "chrome/browser/search_engines/chrome_template_url_service_client.h"
 
 #include "base/memory/ptr_util.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/search_engines/template_url_service.h"
 #include "extensions/common/constants.h"
@@ skipping 45 matching lines @@
 }
 
 void ChromeTemplateURLServiceClient::AddKeywordGeneratedVisit(const GURL& url) {
   if (history_service_)
     history_service_->AddPage(url, base::Time::Now(), NULL, 0, GURL(),
                               history::RedirectList(),
                               ui::PAGE_TRANSITION_KEYWORD_GENERATED,
                               history::SOURCE_BROWSED, false);
 }
 
-void ChromeTemplateURLServiceClient::RestoreExtensionInfoIfNecessary(
-    TemplateURL* template_url) {
-  const TemplateURLData& data = template_url->data();
-  GURL url(data.url());
-  if (url.SchemeIs(extensions::kExtensionScheme)) {
-    const std::string& extension_id = url.host();
-    template_url->set_extension_info(
-        base::MakeUnique<TemplateURL::AssociatedExtensionInfo>(extension_id));
-    template_url->set_type(TemplateURL::OMNIBOX_API_EXTENSION);
-  }
+bool ChromeTemplateURLServiceClient::IsOmniboxExtensionURL(
+    const std::string& url) {
+  return GURL(url).SchemeIs(extensions::kExtensionScheme);
 }
 
 void ChromeTemplateURLServiceClient::OnURLVisited(
     history::HistoryService* history_service,
     ui::PageTransition transition,
     const history::URLRow& row,
     const history::RedirectList& redirects,
     base::Time visit_time) {
   DCHECK_EQ(history_service_, history_service);
   if (!owner_)
     return;
 
   TemplateURLService::URLVisitedDetails visited_details;
   visited_details.url = row.url();
   visited_details.is_keyword_transition =
       ui::PageTransitionCoreTypeIs(transition, ui::PAGE_TRANSITION_KEYWORD);
   owner_->OnHistoryURLVisited(visited_details);
 }