Enable the earth_browser_test on the Mac.  This is the last of the browser tests that were disabled on Mac a while ago.  I've run several try jobs over the last few days with no problems.
Enable the earth_browser_test on the Mac.  This is the last of the
browser tests that were disabled on Mac a while ago.  I've run
several try jobs over the last few days with no problems.

Review URL: http://codereview.chromium.org/2677002

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@2451 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client