Fix convex path renderer bounds computation

R=jvanverth@google.com

Author: bsalomon@google.com

Review URL: https://chromiumcodereview.appspot.com/23905005

git-svn-id: http://skia.googlecode.com/svn/trunk@11069 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed