[Android] Allow setting recently visited search engines as default search engine

components/search_engines/template_url_service.h

Index: components/search_engines/template_url_service.h
diff --git a/components/search_engines/template_url_service.h b/components/search_engines/template_url_service.h
index da7c5169a0f09b3d1ca09bff53e07c62fefc88f4..0657aa9e716db2c9eacba16fe4a38871f9c6747d 100644
--- a/components/search_engines/template_url_service.h
+++ b/components/search_engines/template_url_service.h
@@ -151,6 +151,9 @@ class TemplateURLService : public WebDataServiceConsumer,
                                  bool supports_replacement_only,
                                  TURLsAndMeaningfulLengths* matches);
 
+  // Returns true if the TempalteURL is prepopulated or created by policy.
+  bool IsInDefaultList(const TemplateURL* url);
+
   // Looks up |keyword| and returns the element it maps to.  Returns NULL if
   // the keyword was not found.
   // The caller should not try to delete the returned pointer; the data store