Make extensions DSE persistent in browser prefs

chrome/browser/search_engines/template_url_service_sync_unittest.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 <stddef.h>
 
 #include <memory>
 #include <utility>
 
 #include "base/macros.h"
@@ skipping 147 matching lines @@
 
    void Shutdown() override {}
    void SetOwner(TemplateURLService* owner) override {}
    void DeleteAllSearchTermsForKeyword(TemplateURLID id) override {}
    void SetKeywordSearchTermsForURL(
        const GURL& url,
        TemplateURLID id,
        const base::string16& term) override {}
    void AddKeywordGeneratedVisit(const GURL& url) override {}
    bool IsOmniboxExtensionURL(const std::string& url) override { return false; }
+   void SetExtensionControlledPref(
+      const std::string extension_id, const std::string pref_name,
+      std::unique_ptr<base::Value> pref_value) override {}
 };
 
 }  // namespace
 
 
 // TemplateURLServiceSyncTest -------------------------------------------------
 
 class TemplateURLServiceSyncTest : public testing::Test {
  public:
   typedef TemplateURLService::SyncDataMap SyncDataMap;
@@ skipping 2139 matching lines @@
 
 TEST_F(TemplateURLServiceSyncTest, NonAsciiKeywordDoesNotCrash) {
   model()->Add(CreateTestTemplateURL(UTF8ToUTF16("\xf0\xaf\xa6\x8d"),
                                      "http://key1.com"));
   syncer::SyncDataList initial_data = CreateInitialSyncData();
 
   model()->MergeDataAndStartSyncing(
       syncer::SEARCH_ENGINES, initial_data, PassProcessor(),
       CreateAndPassSyncErrorFactory());
 }