Make process_dumps respect the warnings return code.
Make process_dumps respect the warnings return code.

BUG=256662
R=maruel@chromium.org

Review URL: https://codereview.chromium.org/23533043

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@221779 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build