Fix more clang errors.

Fixed -Wunused-private-field errors.

R=reed@google.com,bsalomon@google.com

Review URL: https://codereview.chromium.org/13474012

git-svn-id: http://skia.googlecode.com/svn/trunk@8547 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed