Make skia almost compile again with clang.

clang is reporting many unused functions and variables.

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

Author: tfarina@chromium.org

Review URL: https://codereview.chromium.org/26167002

git-svn-id: http://skia.googlecode.com/svn/trunk@11630 2bbb7eff-a529-9590-31e7-b0007b416f81
7 files changed