Strip whitespace from the lint message so that we don't get confused by a CRLF on Windows.
Strip whitespace from the lint message so that we don't get confused by a CRLF on Windows.

R=maruel@chromium.org
BUG=235963

Review URL: https://codereview.chromium.org/14383010

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@149216 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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