Remove old WebRTC logging test and clean up accordingly.

New test in https://codereview.chromium.org/38783006/

Review URL: https://codereview.chromium.org/44243002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231315 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 231315