Do not use overloaded method names in StyleResolver

This is a small cleanup that 2 matchUARules() methods
in StyleResolver to have different method names.

BUG=none
TEST=pass compilation

Review URL: https://codereview.chromium.org/625523002

git-svn-id: svn://svn.chromium.org/blink/trunk@183302 bbb929c8-8fbe-4397-9dbb-9b2b20218538