Protector histograms for default search provider change added.

chrome/browser/search_engines/template_url_prepopulate_data.h

Index: chrome/browser/search_engines/template_url_prepopulate_data.h
diff --git a/chrome/browser/search_engines/template_url_prepopulate_data.h b/chrome/browser/search_engines/template_url_prepopulate_data.h
index 1898fde3820d082b98f1977aed17208613ad1f58..9f141600e992d2b4de762d2c5ca998b19c58c612 100644
--- a/chrome/browser/search_engines/template_url_prepopulate_data.h
+++ b/chrome/browser/search_engines/template_url_prepopulate_data.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <stddef.h>
+#include <string>
 #include <vector>
 
 class GURL;
@@ -44,6 +45,11 @@ 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_