DM: catch -r foo -w foo.

BUG=skia:
R=reed@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/152223003

git-svn-id: http://skia.googlecode.com/svn/trunk@13383 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed