Protector histograms for default search provider change added.

chrome/browser/search_engines/template_url_prepopulate_data.h

 // Copyright (c) 2011 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_PREPOPULATE_DATA_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_PREPOPULATE_DATA_H_
 #pragma once
 
 #include <stddef.h>
+#include <string>
 #include <vector>
 
 class GURL;
 class PrefService;
 class TemplateURL;
 
 namespace TemplateURLPrepopulateData {
 
 extern const int kMaxPrepopulatedEngineID;
 
@@ skipping 17 matching lines @@
 TemplateURL* GetPrepopulatedDefaultSearch(PrefService* prefs);
 
 // Returns a TemplateURL from the prepopulated data which has the same origin
 // as the given url.  The caller is responsible for deleting the returned
 // TemplateURL.
 TemplateURL* GetEngineForOrigin(PrefService* prefs, const GURL& url_to_find);
 
 // Returns search engine logo for URLs known to have a search engine logo.
 int GetSearchEngineLogo(const GURL& url_to_find);
 
+// Returns the prepopulated search provider whose search URL matches
+// |search_url| or NULL if none is found.  The caller is responsible for
+// deleting the returned TemplateURL.
+TemplateURL* FindPrepopulatedEngine(const std::string& search_url);
+
 }  // namespace TemplateURLPrepopulateData
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_PREPOPULATE_DATA_H_