Make extensions DSE persistent in browser prefs

components/search_engines/template_url_service_client.h

 // 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.
 
 #ifndef COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_CLIENT_H_
 #define COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_CLIENT_H_
 
 #include "base/strings/string16.h"
 #include "components/search_engines/template_url_id.h"
 
 class GURL;
 class TemplateURL;
 class TemplateURLService;
 
+namespace base {
+class Value;
+}
+
 // This interface provides history related functionality required by
 // TemplateURLService.
 // TODO(hashimoto): Get rid of this once HistoryService gets componentized.
 class TemplateURLServiceClient {
  public:
   virtual ~TemplateURLServiceClient() {}
 
   // Called by TemplateURLService::Shutdown as part of the two phase shutdown
   // of the KeyedService.
   virtual void Shutdown() = 0;
 
   // Sets the pointer to the owner of this object.
   virtual void SetOwner(TemplateURLService* owner) = 0;
 
   // Deletes all search terms for the specified keyword.
   virtual void DeleteAllSearchTermsForKeyword(TemplateURLID id) = 0;
 
   // Sets the search terms for the specified url and keyword.
   virtual void SetKeywordSearchTermsForURL(const GURL& url,
                                            TemplateURLID id,
                                            const base::string16& term) = 0;
 
   // Adds the given URL to history as a keyword generated visit.
   virtual void AddKeywordGeneratedVisit(const GURL& url) = 0;
 
   // Given the main search |url| for a TemplateURL, returns whether the
   // TemplateURL is from an omnibox extension.
   virtual bool IsOmniboxExtensionURL(const std::string& url) = 0;
+
+  virtual void SetExtensionControlledPref(
+      const std::string extension_id, const std::string pref_name,
+      std::unique_ptr<base::Value> pref_value) = 0;
 };
 
 #endif  // COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_CLIENT_H_