Only filter output on 10.6; it doesn't work on 10.7 (Xcode 4) either.
Only filter output on 10.6; it doesn't work on 10.7 (Xcode 4) either.

Review URL: http://codereview.chromium.org/10171001

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@133436 0039d316-1c4b-4281-b951-d872f2087c98

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