Fix the problem that we are using wrong id to request protected surface

Should use player_id instead of demuxer_client_id.

BUG=299226

Review URL: https://codereview.chromium.org/24898002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225645 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225645
Add Remoting Apps v2 test apps to whitelist.

BUG=252878, 276739

Review URL: https://codereview.chromium.org/24842002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225646 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225646