Get rid of the 'unit' test on master.chromium.linux
Get rid of the 'unit' test on master.chromium.linux

'unit' includes multiple tests and some bots had duplicated
tests because of it. 

Review URL: https://chromiumcodereview.appspot.com/11094079

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@161413 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build