Simplify the download build rules for Mac.
Simplify the download build rules for Mac.

TEST=None
BUG=None

Review URL: http://codereview.chromium.org/151133

git-svn-id: http://src.chromium.org/svn/trunk/src@19754 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 811d11e4dd690e0691fb8fc42f1f1e3d3988d18d
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser