Convert "return local_var.Pass();" to "return local_var;".

mojo/converters/array_string/array_string_type_converters.cc

Index: mojo/converters/array_string/array_string_type_converters.cc
diff --git a/mojo/converters/array_string/array_string_type_converters.cc b/mojo/converters/array_string/array_string_type_converters.cc
index 84d3c2a20a9d97869c5f36287ba9834746bdba96..9f99460f3e018e60e5aae4ab347502b5dbe6853f 100644
--- a/mojo/converters/array_string/array_string_type_converters.cc
+++ b/mojo/converters/array_string/array_string_type_converters.cc
@@ -23,7 +23,7 @@ Array<uint8_t> TypeConverter<Array<uint8_t>, std::string>::Convert(
     const std::string& input) {
   auto result = Array<uint8_t>::New(input.size());
   memcpy(&result.front(), input.c_str(), input.size());
-  return result.Pass();
+  return result;
 }
 
 }  // namespace mojo