GitLab

Cleanup: Switch some unit_tests gyp conditions from excluding to including.

Also do not bother building PPAPI test support code when plugins are disabled.

Review URL: https://codereview.chromium.org/435603006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287292 0039d316-1c4b-4281-b951-d872f2087c98