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This removes third_party/IconFamily from Chrome, which creates
questionable results when adding icon sizes < 128px. Since OSX 10.5, OSX
hasn't used indexed icons or alpha masks when a 32-bit icon is available
(see notes in OSServices.framework/IconStorage.h).

BUG=241304
TEST=Create an app shim and inspect Resources/app.icns using OSX Preview
-- ensure the icons are correct.
TBR=darin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/15650005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203050 0039d316-1c4b-4281-b951-d872f2087c98