Handle TemplateURLService load failure better

chrome/browser/search_engines/template_url_service.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_TEMPLATE_URL_SERVICE_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 458 matching lines @@
   // This does NOT notify the delegate or the database.
   //
   // This transfers ownership of the elements in |urls| to |this|, and may
   // delete some elements, so it's not safe for callers to access any elements
   // after calling; to reinforce this, this function clears |urls| on exit.
   void SetTemplateURLs(TemplateURLVector* urls);
 
   // Transitions to the loaded state.
   void ChangeToLoadedState();
 
+  // Copies |initial_default_search_provider_| in as the actual default search
+  // provider and finishes the transition to the loading state.  This is called
+  // in test code, or when some kind of corruption prevents the WebDataService
+  // from loading, so the TemplateURLService doesn't suddenly begin reporting
+  // "no DSP" once it attempts to load.
+  void OnFailedLoad();
+
   // Clears user preferences describing the default search engine.
   void ClearDefaultProviderFromPrefs();
 
   // Returns true if there is no TemplateURL that has a search url with the
   // specified host, or the only TemplateURLs matching the specified host can
   // be replaced.
   bool CanReplaceKeywordForHost(const std::string& host,
                                 TemplateURL** to_replace);
 
   // Returns true if the TemplateURL is replaceable. This doesn't look at the
@@ skipping 293 matching lines @@
   base::CallbackList<void(void)> on_loaded_callbacks_;
 
   // Helper class to manage the default search engine. This will be NULL when
   // using the testing-specific constructor.
   scoped_ptr<DefaultSearchManager> default_search_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(TemplateURLService);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_H_