Implemented 'Reset Search engines' feature.

chrome/browser/search_engines/util.cc

Index: chrome/browser/search_engines/util.cc
diff --git a/chrome/browser/search_engines/util.cc b/chrome/browser/search_engines/util.cc
index 581f513bdbcd982643fe70115425340afacae179..08a17846839fb76584c07d0f8715bbcded019592 100644
--- a/chrome/browser/search_engines/util.cc
+++ b/chrome/browser/search_engines/util.cc
@@ -262,7 +262,6 @@ void GetSearchProvidersUsingKeywordResult(
   DCHECK_EQ(KEYWORDS_RESULT, result.GetType());
   DCHECK(new_resource_keyword_version);
 
-  *new_resource_keyword_version = 0;
   WDKeywordsResult keyword_result = reinterpret_cast<
       const WDResult<WDKeywordsResult>*>(&result)->GetValue();
 
@@ -288,6 +287,25 @@ void GetSearchProvidersUsingKeywordResult(
         GetTemplateURLByID(*template_urls, default_search_provider_id);
   }
 
+  *new_resource_keyword_version = keyword_result.builtin_keyword_version;
+  GetSearchProvidersUsingLoadedEngines(service, profile, template_urls,
+                                       default_search_provider,
+                                       new_resource_keyword_version,
+                                       removed_keyword_guids);
+}
+
+void GetSearchProvidersUsingLoadedEngines(
+    WebDataService* service,
+    Profile* profile,
+    TemplateURLService::TemplateURLVector* template_urls,
+    TemplateURL** default_search_provider,
+    int* new_resource_keyword_version,
+    std::set<std::string>* removed_keyword_guids) {
+  DCHECK(service == NULL || BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(template_urls);
+  DCHECK(default_search_provider);
+  DCHECK(new_resource_keyword_version);
+
   ScopedVector<TemplateURL> prepopulated_urls;
   size_t default_search_index;
   TemplateURLPrepopulateData::GetPrepopulatedEngines(profile,
@@ -299,11 +317,13 @@ void GetSearchProvidersUsingKeywordResult(
   const int resource_keyword_version =
       TemplateURLPrepopulateData::GetDataVersion(
           profile ? profile->GetPrefs() : NULL);
-  if (keyword_result.builtin_keyword_version != resource_keyword_version) {
+  if (*new_resource_keyword_version != resource_keyword_version) {
     MergeEnginesFromPrepopulateData(profile, service, &prepopulated_urls,
         default_search_index, template_urls, default_search_provider,
         removed_keyword_guids);
     *new_resource_keyword_version = resource_keyword_version;
+  } else {
+    *new_resource_keyword_version = 0;
   }
 }