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

components/search_engines/template_url_service_client.h

Index: components/search_engines/template_url_service_client.h
diff --git a/components/search_engines/template_url_service_client.h b/components/search_engines/template_url_service_client.h
index 46147aee3982973bdcd80b53decb7327f08cf6d4..77a22d26706f4ec8eeacf490f5212713a4ff6f4f 100644
--- a/components/search_engines/template_url_service_client.h
+++ b/components/search_engines/template_url_service_client.h
@@ -37,8 +37,9 @@ class TemplateURLServiceClient {
   // Adds the given URL to history as a keyword generated visit.
   virtual void AddKeywordGeneratedVisit(const GURL& url) = 0;
 
-  // Restores the extension info of a TemplateURL loaded from the database.
-  virtual void RestoreExtensionInfoIfNecessary(TemplateURL* template_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;
 };
 
 #endif  // COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_CLIENT_H_