Propagate failure if http uploads fail with http error codes.
Propagate failure if http uploads fail with http error codes.

R=ted.mielczarek
BUG=413
Review URL: http://breakpad.appspot.com/236001


git-svn-id: 7939527bf0a06ad24ad020f729d5600cb42ed5d7@739 4c0a9323-5329-0410-9bdc-e9ce6186880e

mikewied/breakpad,mikewied/breakpad,mikewied/breakpad,mikewied/breakpad,mikewied/breakpad,mikewied/breakpad