Adds extra debugging to SkPathRef that can optionally be turned on in a release build.

Adds extra debugging to SkPathRef that can optionally be turned on in a release build.

This is pretty hacky but hopefully will be quite short-lived.
Committed: https://code.google.com/p/skia/source/detail?r=5793

[bsalomon, 2012-10-03 13:59:18]

See http://codereview.chromium.org/11043017/ for how this can be turned on for
chrome valgrind builds but not normal chrome release builds.

[reed1, 2012-10-03 14:59:56]

lgtm

also, a preemptive lgtm for when we can remove this :)