fNextIndex is redundant.  Remove it.

This is warmup for removing the NULL at the front.

Testing: out/Debug/tests && out/Debug/dm && echo ok

BUG=skia:1979
R=dominikg@chromium.org, tomhudson@chromium.org, halcanary@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/134223002

git-svn-id: http://skia.googlecode.com/svn/trunk@13026 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed