Allow xdg-settings to set the default OS handler for url protocols.

This is used by the registerProtocolHandler feature to set Chrome as the default OS
application for protocols which have default handlers in Chrome.

BUG=83557

Review URL: http://codereview.chromium.org/7433003

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/xdg-utils@93286 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
5 files changed