Revert 255208 "Add VP9 encode support to the remoting host."

> Add VP9 encode support to the remoting host.
> 
> BUG=260879,349862 
> 
> Review URL: https://codereview.chromium.org/28183002

TBR=wez@chromium.org

Review URL: https://codereview.chromium.org/188563002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255313 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255313