Rewrite simple uses of base::ListValue::Append(base::Value*) on CrOS.

chrome/browser/chromeos/file_manager/url_util.cc

Index: chrome/browser/chromeos/file_manager/url_util.cc
diff --git a/chrome/browser/chromeos/file_manager/url_util.cc b/chrome/browser/chromeos/file_manager/url_util.cc
index e8f8bd67980e0b6507d60c0531de57dd554ca59e..035b46902f4dc15c245b304175f18694af71492b 100644
--- a/chrome/browser/chromeos/file_manager/url_util.cc
+++ b/chrome/browser/chromeos/file_manager/url_util.cc
@@ -89,8 +89,7 @@ GURL GetFileManagerMainPageUrlWithParams(
     for (size_t i = 0; i < file_types->extensions.size(); ++i) {
       base::ListValue* extensions_list = new base::ListValue();
       for (size_t j = 0; j < file_types->extensions[i].size(); ++j) {
-        extensions_list->Append(
-            new base::StringValue(file_types->extensions[i][j]));
+        extensions_list->AppendString(file_types->extensions[i][j]);
       }
 
       base::DictionaryValue* dict = new base::DictionaryValue();