Implemented 'Reset Search engines' feature.

chrome/browser/search_engines/util.h

 // 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.
 
 #ifndef CHROME_BROWSER_SEARCH_ENGINES_UTIL_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_UTIL_H_
 
 // This file contains utility functions for search engine functionality.
 #include <set>
 #include <string>
@@ skipping 32 matching lines @@
 // added to it.
 void GetSearchProvidersUsingKeywordResult(
     const WDTypedResult& result,
     WebDataService* service,
     Profile* profile,
     TemplateURLService::TemplateURLVector* template_urls,
     TemplateURL** default_search_provider,
     int* new_resource_keyword_version,
     std::set<std::string>* removed_keyword_guids);
 
+// Like GetSearchProvidersUsingKeywordResult(), but allows the caller to pass in
+// engines in |template_urls| instead of getting them via processing a web data
+// service request.
+// |resource_keyword_version| should contain the version number of the current
+// keyword data, i.e. the version number of the most recent prepopulate data
+// that has been merged into the current keyword data.  On exit, this will be
+// set as in GetSearchProvidersUsingKeywordResult().
+void GetSearchProvidersUsingLoadedEngines(
+    WebDataService* service,
+    Profile* profile,
+    TemplateURLService::TemplateURLVector* template_urls,
+    TemplateURL** default_search_provider,
+    int* resource_keyword_version,
+    std::set<std::string>* removed_keyword_guids);
+
 // Due to a bug, the |input_encodings| field of TemplateURLData could have
 // contained duplicate entries.  This removes those entries and returns whether
 // any were found.
 bool DeDupeEncodings(std::vector<std::string>* encodings);
 
 // Removes (and deletes) TemplateURLs from |template_urls| and |service| if they
 // have duplicate prepopulate ids. If |removed_keyword_guids| is not NULL, the
 // Sync GUID of each item removed from the DB will be added to it. This is a
 // helper used by GetSearchProvidersUsingKeywordResult(), but is declared here
 // so it's accessible by unittests.
 void RemoveDuplicatePrepopulateIDs(
     WebDataService* service,
     const ScopedVector<TemplateURL>& prepopulated_urls,
     TemplateURL* default_search_provider,
     TemplateURLService::TemplateURLVector* template_urls,
     std::set<std::string>* removed_keyword_guids);
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_UTIL_H_