Fix failures on some bots by not failing the step if the crash dump dir does not exit. Review URL: http://codereview.chromium.org/7518015
Fix failures on some bots by not failing the step if the crash dump dir
does not exit.
Review URL: http://codereview.chromium.org/7518015

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@94801 0039d316-1c4b-4281-b951-d872f2087c98

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