Revert GN push on Linux only.

This possibly caused a failure on the Android AOSP bot.

TBR=blundell

Review URL: https://codereview.chromium.org/146913008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248986 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248986