fix memory leak introduced in 9e5f85e8

R=sugoi@chromium.org, robertphillips@google.com

Author: halcanary@google.com

Review URL: https://codereview.chromium.org/199173002

git-svn-id: http://skia.googlecode.com/svn/trunk@13786 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed