An API returning a Promise should not throw an exceptions [overload version]

[1] made such APIs return rejected Promises instead of throwing exceptions,
but overloaded functions were not covered. This CL fixes the problem.

1: https://src.chromium.org/viewvc/blink?view=rev&revision=171450

BUG=359586

Review URL: https://codereview.chromium.org/675693002

git-svn-id: svn://svn.chromium.org/blink/trunk@184291 bbb929c8-8fbe-4397-9dbb-9b2b20218538