GitLab

This adds setLosslessEncode() and setLosslessColor() calls to the
ClientPlugin API, which future updates to the app can use to request
lossless frames if desired.

BUG=260879,134202

Review URL: https://codereview.chromium.org/307463005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@273995 0039d316-1c4b-4281-b951-d872f2087c98