Add RemotingUI class to handle chrome://remoting URLs.

These URLs are handled by a plugin that is registered to the
chrome-internal-plugin/remoting MIME type.

BUG=none
TEST=verify plugin is loaded when navigating to chrome://remoting

Review URL: http://codereview.chromium.org/2812017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@50655 0039d316-1c4b-4281-b951-d872f2087c98
6 files changed