Add a content_resources target which currently includes the sandbox definitions on mac

BUG=90443
TEST=none


Review URL: http://codereview.chromium.org/8533023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110115 0039d316-1c4b-4281-b951-d872f2087c98
8 files changed