Added counter to correctly reflect the number of non-compiled functions.
Added usages of variables used only for tracing or debug to avoid compiler
warnings.

R=clemensh@chromium.org

Change-Id: I4c8d9c0f43bf23250b4702e43592cd64046d28c7
Reviewed-on: https://chromium-review.googlesource.com/907890
Commit-Queue: Kim-Anh Tran <kimanh@google.com>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51201}