Remove the conflicting factors determining whether debug stub is compiled in and whether it is turned on.
Remove the conflicting factors determining whether debug stub is compiled in
and whether it is turned on.

BUG:https://tracker.corp.google.com/story/show/362095
TEST:trybots
Review URL: http://codereview.chromium.org/6854032

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@4928 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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